Coherent Corp. vs KLA Corporation
Measured twinCOHR / KLACPrices through Oct 22, 2026
Why these are rivals: #1 and #2 by market value ($217B vs $46B) with SEC SIC 3827 (Optical Instruments & Lenses).
The price gap between these two has a measured habit of closing. A 2 standard deviation gap becomes a paired paper idea.
- no divergence: z = -0.64 (needs |z| >= 2.0)
Business leadership
KLAC is the larger business
Annual revenue reported to the SEC. Scale, not market share.
| Year | COHR | KLAC | Larger |
|---|---|---|---|
| 2025 | $5.8B | $12.2B | KLAC |
| 2024 | $4.7B | $9.8B | KLAC |
| 2023 | $5.2B | $10.5B | KLAC |
| 2022 | $3.3B | $9.2B | KLAC |
| 2021 | $3.1B | $6.9B | KLAC |
| 2020 | $2.4B | $5.8B | KLAC |
KLAC led in every year with figures for both. Market value: COHR $45.7B, KLAC $217.2B.
Stock leadership
KLAC is ahead now
Measured against the pair's own last 252 trading days.
KLAC leads COHR by 0.64 standard deviations: +10.3% over its usual price ratio. 1 lead switch in the last year.
| Price change | 3 mo | 6 mo | 12 mo |
|---|---|---|---|
| COHR | -26.4% | -38.5% | +72.1% |
| KLAC | -29.8% | -18.6% | +28.8% |
Relationship
The gap has closed before
Only these tests can make a pair tradable on paper.
- Pass
- Aligned sessions: 1035 (needs >= 254)
- Pass
- Co-movement: daily return correlation, 252 sessions: 0.61 (needs >= 0.60)
- Pass
- Mean reversion: ADF t-statistic of the spread: -3.17 (needs <= -2.873 (5% critical value))
- Pass
- Speed: half-life of the spread, sessions: 12.35 (needs <= 63)
- Data
- Both stocks current
The twins over two years
Prices side by side, and the gap between them
COHR Coherent Corp. KLAC KLA CorporationPrice index, 100 = 2024-10-18. Tint = which stock is ahead of the pair's usual 1-year relationship (z beyond +/-0.5).
Spread z-score: COHR relative to KLAC, against the 252 sessions before each day. Above 0: COHR ahead; below 0: KLAC ahead. Lines at +/-2 (idea) and +/-4 (stop).
Data table (504 sessions)
| Date | COHR index | KLAC index | z | Ahead |
|---|---|---|---|---|
| 2026-10-22 | 211.56 | 217.87 | -0.64 | KLAC ahead |
| 2026-10-21 | 241.81 | 240.86 | -0.41 | near the usual relationship |
| 2026-10-20 | 235.98 | 238.37 | -0.49 | near the usual relationship |
| 2026-10-19 | 236.20 | 245.24 | -0.65 | KLAC ahead |
| 2026-10-16 | 237.10 | 244.27 | -0.58 | KLAC ahead |
| 2026-10-15 | 255.12 | 257.12 | -0.43 | near the usual relationship |
| 2026-10-14 | 268.06 | 263.53 | -0.27 | near the usual relationship |
| 2026-10-13 | 295.21 | 271.18 | +0.15 | near the usual relationship |
| 2026-10-12 | 293.21 | 280.20 | -0.08 | near the usual relationship |
| 2026-10-09 | 318.25 | 288.23 | +0.25 | near the usual relationship |
| 2026-10-08 | 307.80 | 289.93 | +0.02 | near the usual relationship |
| 2026-10-07 | 340.59 | 290.09 | +0.63 | COHR ahead |
| 2026-10-06 | 344.46 | 291.02 | +0.68 | COHR ahead |
| 2026-10-05 | 339.65 | 304.85 | +0.34 | near the usual relationship |
| 2026-10-02 | 343.11 | 304.91 | +0.40 | near the usual relationship |
| 2026-10-01 | 324.94 | 295.25 | +0.28 | near the usual relationship |
| 2026-09-30 | 293.00 | 287.29 | -0.14 | near the usual relationship |
| 2026-09-29 | 297.48 | 289.65 | -0.09 | near the usual relationship |
| 2026-09-28 | 287.54 | 278.80 | -0.06 | near the usual relationship |
| 2026-09-25 | 301.16 | 276.96 | +0.24 | near the usual relationship |
| 2026-09-24 | 295.85 | 275.76 | +0.17 | near the usual relationship |
| 2026-09-23 | 306.02 | 276.87 | +0.34 | near the usual relationship |
| 2026-09-22 | 315.98 | 277.55 | +0.51 | COHR ahead |
| 2026-09-21 | 327.31 | 271.13 | +0.82 | COHR ahead |
| 2026-09-18 | 323.08 | 260.85 | +0.96 | COHR ahead |
| 2026-09-17 | 301.31 | 249.04 | +0.85 | COHR ahead |
| 2026-09-16 | 295.15 | 246.65 | +0.80 | COHR ahead |
| 2026-09-15 | 276.06 | 247.63 | +0.43 | near the usual relationship |
| 2026-09-14 | 271.30 | 249.20 | +0.32 | near the usual relationship |
| 2026-09-11 | 310.87 | 266.23 | +0.68 | COHR ahead |
| 2026-09-10 | 298.45 | 261.13 | +0.58 | COHR ahead |
| 2026-09-09 | 308.95 | 269.57 | +0.60 | COHR ahead |
| 2026-09-08 | 307.32 | 278.52 | +0.41 | near the usual relationship |
| 2026-09-04 | 286.94 | 273.54 | +0.16 | near the usual relationship |
| 2026-09-03 | 269.17 | 254.88 | +0.20 | near the usual relationship |
| 2026-09-02 | 273.48 | 253.88 | +0.31 | near the usual relationship |
| 2026-09-01 | 276.93 | 251.86 | +0.42 | near the usual relationship |
| 2026-08-31 | 282.84 | 258.58 | +0.40 | near the usual relationship |
| 2026-08-28 | 284.23 | 258.71 | +0.43 | near the usual relationship |
| 2026-08-27 | 300.71 | 270.84 | +0.48 | near the usual relationship |
| 2026-08-26 | 299.67 | 270.93 | +0.47 | near the usual relationship |
| 2026-08-25 | 293.33 | 270.21 | +0.39 | near the usual relationship |
| 2026-08-24 | 280.45 | 267.60 | +0.22 | near the usual relationship |
| 2026-08-21 | 294.74 | 271.16 | +0.40 | near the usual relationship |
| 2026-08-20 | 295.26 | 273.92 | +0.37 | near the usual relationship |
| 2026-08-19 | 292.65 | 276.00 | +0.30 | near the usual relationship |
| 2026-08-18 | 311.95 | 287.08 | +0.42 | near the usual relationship |
| 2026-08-17 | 357.55 | 303.25 | +0.81 | COHR ahead |
| 2026-08-14 | 331.70 | 300.24 | +0.51 | COHR ahead |
| 2026-08-13 | 333.13 | 308.57 | +0.41 | near the usual relationship |
| 2026-08-12 | 362.05 | 306.92 | +0.83 | COHR ahead |
| 2026-08-11 | 334.49 | 295.45 | +0.64 | COHR ahead |
| 2026-08-10 | 331.01 | 284.06 | +0.78 | COHR ahead |
| 2026-08-07 | 385.96 | 291.97 | +1.38 | COHR ahead |
| 2026-08-06 | 340.24 | 284.77 | +0.92 | COHR ahead |
| 2026-08-05 | 334.13 | 284.15 | +0.85 | COHR ahead |
| 2026-08-04 | 329.56 | 288.05 | +0.73 | COHR ahead |
| 2026-08-03 | 293.33 | 269.34 | +0.50 | COHR ahead |
| 2026-07-31 | 267.63 | 269.44 | +0.07 | near the usual relationship |
| 2026-07-30 | 253.55 | 265.77 | -0.11 | near the usual relationship |
| 2026-07-29 | 226.05 | 250.83 | -0.37 | near the usual relationship |
| 2026-07-28 | 247.71 | 281.20 | -0.48 | near the usual relationship |
| 2026-07-27 | 276.20 | 299.71 | -0.26 | near the usual relationship |
| 2026-07-24 | 287.48 | 310.26 | -0.23 | near the usual relationship |
| 2026-07-23 | 318.86 | 322.36 | +0.07 | near the usual relationship |
| 2026-07-22 | 317.82 | 316.41 | +0.15 | near the usual relationship |
| 2026-07-21 | 322.94 | 320.64 | +0.17 | near the usual relationship |
| 2026-07-20 | 290.54 | 305.96 | -0.10 | near the usual relationship |
| 2026-07-17 | 282.60 | 313.55 | -0.33 | near the usual relationship |
| 2026-07-16 | 281.95 | 323.31 | -0.48 | near the usual relationship |
| 2026-07-15 | 304.77 | 330.87 | -0.22 | near the usual relationship |
| 2026-07-14 | 316.37 | 339.52 | -0.16 | near the usual relationship |
| 2026-07-13 | 312.93 | 327.55 | -0.05 | near the usual relationship |
| 2026-07-10 | 330.35 | 341.21 | +0.02 | near the usual relationship |
| 2026-07-09 | 333.14 | 338.27 | +0.10 | near the usual relationship |
| 2026-07-08 | 322.76 | 325.97 | +0.13 | near the usual relationship |
| 2026-07-07 | 319.79 | 319.03 | +0.19 | near the usual relationship |
| 2026-07-06 | 341.75 | 343.85 | +0.16 | near the usual relationship |
| 2026-07-02 | 339.37 | 347.15 | +0.09 | near the usual relationship |
| 2026-07-01 | 375.29 | 392.31 | +0.01 | near the usual relationship |
| 2026-06-30 | 401.58 | 444.66 | -0.24 | near the usual relationship |
| 2026-06-29 | 398.27 | 410.29 | +0.08 | near the usual relationship |
| 2026-06-26 | 387.42 | 366.44 | +0.45 | near the usual relationship |
| 2026-06-25 | 414.59 | 381.42 | +0.58 | COHR ahead |
| 2026-06-24 | 399.57 | 354.42 | +0.74 | COHR ahead |
| 2026-06-23 | 388.09 | 360.33 | +0.55 | COHR ahead |
| 2026-06-22 | 433.15 | 396.69 | +0.61 | COHR ahead |
| 2026-06-18 | 396.59 | 382.54 | +0.40 | near the usual relationship |
| 2026-06-17 | 385.68 | 351.84 | +0.64 | COHR ahead |
| 2026-06-16 | 389.71 | 349.78 | +0.72 | COHR ahead |
| 2026-06-15 | 421.30 | 377.91 | +0.72 | COHR ahead |
| 2026-06-12 | 391.97 | 375.14 | +0.46 | near the usual relationship |
| 2026-06-11 | 370.13 | 355.43 | +0.46 | near the usual relationship |
| 2026-06-10 | 361.16 | 314.75 | +0.86 | COHR ahead |
| 2026-06-09 | 362.35 | 315.30 | +0.87 | COHR ahead |
| 2026-06-08 | 409.17 | 310.69 | +1.44 | COHR ahead |
| 2026-06-05 | 383.78 | 284.32 | +1.55 | COHR ahead |
| 2026-06-04 | 429.50 | 314.08 | +1.62 | COHR ahead |
| 2026-06-03 | 424.95 | 313.20 | +1.60 | COHR ahead |
| 2026-06-02 | 434.58 | 301.42 | +1.87 | COHR ahead |
| 2026-06-01 | 369.44 | 285.92 | +1.43 | COHR ahead |
| 2026-05-29 | 367.98 | 283.22 | +1.47 | COHR ahead |
| 2026-05-28 | 383.74 | 284.09 | +1.65 | COHR ahead |
| 2026-05-27 | 387.03 | 288.45 | +1.64 | COHR ahead |
| 2026-05-26 | 388.22 | 296.44 | +1.55 | COHR ahead |
| 2026-05-22 | 384.37 | 278.31 | +1.79 | COHR ahead |
| 2026-05-21 | 384.81 | 271.50 | +1.92 | COHR ahead |
| 2026-05-20 | 364.96 | 269.63 | +1.74 | COHR ahead |
| 2026-05-19 | 360.00 | 256.53 | +1.92 | COHR ahead |
| 2026-05-18 | 369.37 | 258.86 | +2.01 | COHR ahead |
| 2026-05-15 | 389.34 | 265.92 | +2.15 | COHR ahead |
| 2026-05-14 | 412.24 | 278.98 | +2.22 | COHR ahead |
| 2026-05-13 | 410.98 | 272.61 | +2.34 | COHR ahead |
| 2026-05-12 | 380.75 | 266.96 | +2.12 | COHR ahead |
| 2026-05-11 | 386.53 | 271.94 | +2.13 | COHR ahead |
| 2026-05-08 | 341.30 | 275.48 | +1.54 | COHR ahead |
| 2026-05-07 | 324.94 | 259.87 | +1.59 | COHR ahead |
| 2026-05-06 | 350.88 | 267.68 | +1.82 | COHR ahead |
| 2026-05-05 | 341.78 | 255.39 | +1.94 | COHR ahead |
| 2026-05-04 | 335.83 | 252.51 | +1.93 | COHR ahead |
| 2026-05-01 | 335.44 | 254.42 | +1.91 | COHR ahead |
| 2026-04-30 | 325.47 | 257.97 | +1.73 | COHR ahead |
| 2026-04-29 | 310.42 | 267.67 | +1.36 | COHR ahead |
| 2026-04-28 | 309.45 | 266.61 | +1.37 | COHR ahead |
| 2026-04-27 | 327.32 | 280.02 | +1.41 | COHR ahead |
| 2026-04-24 | 342.15 | 285.18 | +1.55 | COHR ahead |
| 2026-04-23 | 343.76 | 267.56 | +1.87 | COHR ahead |
| 2026-04-22 | 356.79 | 267.06 | +2.07 | COHR ahead |
| 2026-04-21 | 349.98 | 263.13 | +2.07 | COHR ahead |
| 2026-04-20 | 353.77 | 266.07 | +2.09 | COHR ahead |
| 2026-04-17 | 351.24 | 264.02 | +2.12 | COHR ahead |
| 2026-04-16 | 333.91 | 255.68 | +2.05 | COHR ahead |
| 2026-04-15 | 313.75 | 257.64 | +1.74 | COHR ahead |
| 2026-04-14 | 319.07 | 264.68 | +1.71 | COHR ahead |
| 2026-04-13 | 313.48 | 260.68 | +1.71 | COHR ahead |
| 2026-04-10 | 313.04 | 256.04 | +1.81 | COHR ahead |
| 2026-04-09 | 289.29 | 254.56 | +1.48 | COHR ahead |
| 2026-04-08 | 286.87 | 246.47 | +1.60 | COHR ahead |
| 2026-04-07 | 259.70 | 228.27 | +1.51 | COHR ahead |
| 2026-04-06 | 257.78 | 226.97 | +1.51 | COHR ahead |
| 2026-04-02 | 262.81 | 223.55 | +1.69 | COHR ahead |
| 2026-04-01 | 252.27 | 223.99 | +1.50 | COHR ahead |
| 2026-03-31 | 242.50 | 217.00 | +1.48 | COHR ahead |
| 2026-03-30 | 223.61 | 203.76 | +1.41 | COHR ahead |
| 2026-03-27 | 247.87 | 212.70 | +1.71 | COHR ahead |
| 2026-03-26 | 247.67 | 213.87 | +1.70 | COHR ahead |
| 2026-03-25 | 276.94 | 227.53 | +1.96 | COHR ahead |
| 2026-03-24 | 277.24 | 230.82 | +1.92 | COHR ahead |
| 2026-03-23 | 259.65 | 222.75 | +1.79 | COHR ahead |
| 2026-03-20 | 258.20 | 220.87 | +1.82 | COHR ahead |
| 2026-03-19 | 280.54 | 222.77 | +2.22 | COHR ahead |
| 2026-03-18 | 261.84 | 218.47 | +2.00 | COHR ahead |
| 2026-03-17 | 250.23 | 218.32 | +1.79 | COHR ahead |
| 2026-03-16 | 251.83 | 211.97 | +1.99 | COHR ahead |
| 2026-03-13 | 247.13 | 209.08 | +1.99 | COHR ahead |
| 2026-03-12 | 245.62 | 207.74 | +2.02 | COHR ahead |
| 2026-03-11 | 255.94 | 215.91 | +2.06 | COHR ahead |
| 2026-03-10 | 265.34 | 214.13 | +2.31 | COHR ahead |
| 2026-03-09 | 256.87 | 210.62 | +2.26 | COHR ahead |
| 2026-03-06 | 239.97 | 198.16 | +2.26 | COHR ahead |
| 2026-03-05 | 258.44 | 210.66 | +2.36 | COHR ahead |
| 2026-03-04 | 279.81 | 217.52 | +2.66 | COHR ahead |
| 2026-03-03 | 285.87 | 212.43 | +2.96 | COHR ahead |
| 2026-03-02 | 304.30 | 226.22 | +3.02 | COHR ahead |
| 2026-02-27 | 263.60 | 224.69 | +2.30 | COHR ahead |
| 2026-02-26 | 254.65 | 224.65 | +2.14 | COHR ahead |
| 2026-02-25 | 272.73 | 227.95 | +2.48 | COHR ahead |
| 2026-02-24 | 259.45 | 222.05 | +2.39 | COHR ahead |
| 2026-02-23 | 253.37 | 219.25 | +2.36 | COHR ahead |
| 2026-02-20 | 252.65 | 220.48 | +2.34 | COHR ahead |
| 2026-02-19 | 236.67 | 216.63 | +2.09 | COHR ahead |
| 2026-02-18 | 227.92 | 218.17 | +1.84 | COHR ahead |
| 2026-02-17 | 223.92 | 216.68 | +1.79 | COHR ahead |
| 2026-02-13 | 221.14 | 215.78 | +1.76 | COHR ahead |
| 2026-02-12 | 219.99 | 213.83 | +1.80 | COHR ahead |
| 2026-02-11 | 227.72 | 218.05 | +1.91 | COHR ahead |
| 2026-02-10 | 232.48 | 210.88 | +2.26 | COHR ahead |
| 2026-02-09 | 246.83 | 212.25 | +2.63 | COHR ahead |
| 2026-02-06 | 231.78 | 212.66 | +2.25 | COHR ahead |
| 2026-02-05 | 213.01 | 196.17 | +2.26 | COHR ahead |
| 2026-02-04 | 214.80 | 192.66 | +2.46 | COHR ahead |
| 2026-02-03 | 233.31 | 199.78 | +2.81 | COHR ahead |
| 2026-02-02 | 226.45 | 207.87 | +2.39 | COHR ahead |
| 2026-01-30 | 216.00 | 210.45 | +2.01 | COHR ahead |
| 2026-01-29 | 219.75 | 248.29 | +1.03 | COHR ahead |
| 2026-01-28 | 225.12 | 239.82 | +1.43 | COHR ahead |
| 2026-01-27 | 217.86 | 238.21 | +1.26 | COHR ahead |
| 2026-01-26 | 201.32 | 227.41 | +1.04 | COHR ahead |
| 2026-01-23 | 200.49 | 222.95 | +1.14 | COHR ahead |
| 2026-01-22 | 206.37 | 221.07 | +1.38 | COHR ahead |
| 2026-01-21 | 205.09 | 224.02 | +1.26 | COHR ahead |
| 2026-01-20 | 196.95 | 219.03 | +1.14 | COHR ahead |
| 2026-01-16 | 194.48 | 231.06 | +0.69 | COHR ahead |
| 2026-01-15 | 199.49 | 227.70 | +0.96 | COHR ahead |
| 2026-01-14 | 187.43 | 211.42 | +1.03 | COHR ahead |
| 2026-01-13 | 193.45 | 212.49 | +1.21 | COHR ahead |
| 2026-01-12 | 188.52 | 210.48 | +1.10 | COHR ahead |
| 2026-01-09 | 181.27 | 206.33 | +0.96 | COHR ahead |
| 2026-01-08 | 176.27 | 195.22 | +1.14 | COHR ahead |
| 2026-01-07 | 195.07 | 200.39 | +1.61 | COHR ahead |
| 2026-01-06 | 197.61 | 205.59 | +1.52 | COHR ahead |
| 2026-01-05 | 189.72 | 199.32 | +1.45 | COHR ahead |
| 2026-01-02 | 197.83 | 187.83 | +2.10 | COHR ahead |
| 2025-12-31 | 187.90 | 179.08 | +2.08 | COHR ahead |
| 2025-12-30 | 190.18 | 183.29 | +2.00 | COHR ahead |
| 2025-12-29 | 192.43 | 185.76 | +1.99 | COHR ahead |
| 2025-12-26 | 195.17 | 188.59 | +1.98 | COHR ahead |
| 2025-12-24 | 194.82 | 188.20 | +1.98 | COHR ahead |
| 2025-12-23 | 195.33 | 186.99 | +2.03 | COHR ahead |
| 2025-12-22 | 194.42 | 186.53 | +2.02 | COHR ahead |
| 2025-12-19 | 189.18 | 183.59 | +1.93 | COHR ahead |
| 2025-12-18 | 178.88 | 180.16 | +1.68 | COHR ahead |
| 2025-12-17 | 173.51 | 172.73 | +1.74 | COHR ahead |
| 2025-12-16 | 178.36 | 180.30 | +1.63 | COHR ahead |
| 2025-12-15 | 181.67 | 180.56 | +1.73 | COHR ahead |
| 2025-12-12 | 181.55 | 175.96 | +1.88 | COHR ahead |
| 2025-12-11 | 202.08 | 183.66 | +2.28 | COHR ahead |
| 2025-12-10 | 201.01 | 182.59 | +2.27 | COHR ahead |
| 2025-12-09 | 196.20 | 180.63 | +2.18 | COHR ahead |
| 2025-12-08 | 189.21 | 180.48 | +1.94 | COHR ahead |
| 2025-12-05 | 185.07 | 178.99 | +1.85 | COHR ahead |
| 2025-12-04 | 180.55 | 178.05 | +1.73 | COHR ahead |
| 2025-12-03 | 174.04 | 178.59 | +1.48 | COHR ahead |
| 2025-12-02 | 167.86 | 175.36 | +1.36 | COHR ahead |
| 2025-12-01 | 166.45 | 170.54 | +1.47 | COHR ahead |
| 2025-11-28 | 167.22 | 173.24 | +1.39 | COHR ahead |
| 2025-11-26 | 156.77 | 170.82 | +1.08 | COHR ahead |
| 2025-11-25 | 151.53 | 168.88 | +0.93 | COHR ahead |
| 2025-11-24 | 154.55 | 167.53 | +1.07 | COHR ahead |
| 2025-11-21 | 142.02 | 161.69 | +0.77 | COHR ahead |
| 2025-11-20 | 138.05 | 162.48 | +0.58 | COHR ahead |
| 2025-11-19 | 145.52 | 172.06 | +0.54 | COHR ahead |
| 2025-11-18 | 140.64 | 165.52 | +0.56 | COHR ahead |
| 2025-11-17 | 141.58 | 167.08 | +0.53 | COHR ahead |
| 2025-11-14 | 141.84 | 167.18 | +0.53 | COHR ahead |
| 2025-11-13 | 142.49 | 171.21 | +0.41 | near the usual relationship |
| 2025-11-12 | 159.49 | 176.70 | +0.85 | COHR ahead |
| 2025-11-11 | 160.86 | 175.51 | +0.93 | COHR ahead |
| 2025-11-10 | 169.72 | 179.50 | +1.09 | COHR ahead |
| 2025-11-07 | 157.29 | 175.88 | +0.79 | COHR ahead |
| 2025-11-06 | 162.17 | 177.80 | +0.89 | COHR ahead |
| 2025-11-05 | 137.06 | 180.85 | -0.12 | near the usual relationship |
| 2025-11-04 | 131.02 | 175.90 | -0.22 | near the usual relationship |
| 2025-11-03 | 134.38 | 179.68 | -0.20 | near the usual relationship |
| 2025-10-31 | 134.34 | 178.14 | -0.16 | near the usual relationship |
| 2025-10-30 | 135.10 | 178.98 | -0.16 | near the usual relationship |
| 2025-10-29 | 140.55 | 182.06 | -0.04 | near the usual relationship |
| 2025-10-28 | 136.66 | 177.75 | -0.07 | near the usual relationship |
| 2025-10-27 | 137.42 | 179.09 | -0.09 | near the usual relationship |
| 2025-10-24 | 131.67 | 174.32 | -0.18 | near the usual relationship |
| 2025-10-23 | 123.71 | 170.81 | -0.40 | near the usual relationship |
| 2025-10-22 | 117.45 | 164.23 | -0.48 | near the usual relationship |
| 2025-10-21 | 122.97 | 169.11 | -0.40 | near the usual relationship |
| 2025-10-20 | 122.37 | 169.91 | -0.45 | near the usual relationship |
| 2025-10-17 | 118.45 | 163.10 | -0.41 | near the usual relationship |
| 2025-10-16 | 118.05 | 161.94 | -0.40 | near the usual relationship |
| 2025-10-15 | 112.40 | 160.20 | -0.60 | KLAC ahead |
| 2025-10-14 | 111.34 | 151.17 | -0.35 | near the usual relationship |
| 2025-10-13 | 117.20 | 151.06 | -0.08 | near the usual relationship |
| 2025-10-10 | 113.10 | 144.84 | -0.05 | near the usual relationship |
| 2025-10-09 | 124.55 | 155.26 | +0.09 | near the usual relationship |
| 2025-10-08 | 118.77 | 156.60 | -0.21 | near the usual relationship |
| 2025-10-07 | 115.61 | 159.87 | -0.46 | near the usual relationship |
| 2025-10-06 | 116.84 | 167.97 | -0.66 | KLAC ahead |
| 2025-10-03 | 115.63 | 162.35 | -0.54 | KLAC ahead |
| 2025-10-02 | 114.82 | 167.90 | -0.76 | KLAC ahead |
| 2025-10-01 | 116.72 | 166.37 | -0.63 | KLAC ahead |
| 2025-09-30 | 109.66 | 158.96 | -0.72 | KLAC ahead |
| 2025-09-29 | 109.92 | 156.83 | -0.64 | KLAC ahead |
| 2025-09-26 | 108.92 | 156.85 | -0.69 | KLAC ahead |
| 2025-09-25 | 108.49 | 156.09 | -0.69 | KLAC ahead |
| 2025-09-24 | 108.44 | 157.50 | -0.74 | KLAC ahead |
| 2025-09-23 | 111.26 | 157.87 | -0.62 | KLAC ahead |
| 2025-09-22 | 116.66 | 157.88 | -0.38 | near the usual relationship |
| 2025-09-19 | 111.08 | 153.98 | -0.50 | KLAC ahead |
| 2025-09-18 | 110.00 | 154.26 | -0.56 | KLAC ahead |
| 2025-09-17 | 105.27 | 145.89 | -0.50 | KLAC ahead |
| 2025-09-16 | 106.35 | 145.99 | -0.45 | near the usual relationship |
| 2025-09-15 | 108.26 | 145.75 | -0.35 | near the usual relationship |
| 2025-09-12 | 104.85 | 142.08 | -0.38 | near the usual relationship |
| 2025-09-11 | 105.38 | 141.38 | -0.32 | near the usual relationship |
| 2025-09-10 | 105.35 | 137.45 | -0.18 | near the usual relationship |
| 2025-09-09 | 101.01 | 135.25 | -0.31 | near the usual relationship |
| 2025-09-08 | 100.45 | 133.97 | -0.29 | near the usual relationship |
| 2025-09-05 | 99.60 | 133.39 | -0.31 | near the usual relationship |
| 2025-09-04 | 97.34 | 128.71 | -0.24 | near the usual relationship |
| 2025-09-03 | 90.06 | 124.37 | -0.46 | near the usual relationship |
| 2025-09-02 | 89.38 | 124.73 | -0.51 | KLAC ahead |
| 2025-08-29 | 92.10 | 128.52 | -0.51 | KLAC ahead |
| 2025-08-28 | 96.92 | 131.76 | -0.37 | near the usual relationship |
| 2025-08-27 | 92.34 | 131.00 | -0.59 | KLAC ahead |
| 2025-08-26 | 93.23 | 130.89 | -0.54 | KLAC ahead |
| 2025-08-25 | 92.13 | 129.63 | -0.55 | KLAC ahead |
| 2025-08-22 | 91.52 | 128.26 | -0.52 | KLAC ahead |
| 2025-08-21 | 88.16 | 128.57 | -0.73 | KLAC ahead |
| 2025-08-20 | 88.11 | 129.46 | -0.77 | KLAC ahead |
| 2025-08-19 | 89.34 | 129.12 | -0.67 | KLAC ahead |
| 2025-08-18 | 92.12 | 130.19 | -0.55 | KLAC ahead |
| 2025-08-15 | 95.08 | 128.95 | -0.34 | near the usual relationship |
| 2025-08-14 | 93.30 | 140.81 | -0.88 | KLAC ahead |
| 2025-08-13 | 116.06 | 139.93 | +0.27 | near the usual relationship |
| 2025-08-12 | 118.66 | 137.88 | +0.46 | near the usual relationship |
| 2025-08-11 | 115.65 | 134.14 | +0.48 | near the usual relationship |
| 2025-08-08 | 117.52 | 134.82 | +0.54 | COHR ahead |
| 2025-08-07 | 115.87 | 134.42 | +0.49 | near the usual relationship |
| 2025-08-06 | 109.08 | 130.91 | +0.33 | near the usual relationship |
| 2025-08-05 | 107.50 | 130.20 | +0.29 | near the usual relationship |
| 2025-08-04 | 108.66 | 134.94 | +0.17 | near the usual relationship |
| 2025-08-01 | 104.64 | 130.67 | +0.15 | near the usual relationship |
| 2025-07-31 | 109.54 | 129.55 | +0.42 | near the usual relationship |
| 2025-07-30 | 109.16 | 136.32 | +0.16 | near the usual relationship |
| 2025-07-29 | 108.91 | 135.01 | +0.20 | near the usual relationship |
| 2025-07-28 | 106.18 | 136.05 | +0.04 | near the usual relationship |
| 2025-07-25 | 101.94 | 132.95 | -0.04 | near the usual relationship |
| 2025-07-24 | 100.50 | 133.26 | -0.12 | near the usual relationship |
| 2025-07-23 | 100.20 | 132.21 | -0.09 | near the usual relationship |
| 2025-07-22 | 98.77 | 131.50 | -0.13 | near the usual relationship |
| 2025-07-21 | 101.68 | 138.21 | -0.23 | near the usual relationship |
| 2025-07-18 | 101.39 | 137.23 | -0.20 | near the usual relationship |
| 2025-07-17 | 102.09 | 138.11 | -0.20 | near the usual relationship |
| 2025-07-16 | 99.58 | 137.58 | -0.30 | near the usual relationship |
| 2025-07-15 | 97.80 | 138.03 | -0.40 | near the usual relationship |
| 2025-07-14 | 96.22 | 135.86 | -0.39 | near the usual relationship |
| 2025-07-11 | 94.98 | 136.26 | -0.46 | near the usual relationship |
| 2025-07-10 | 95.41 | 136.86 | -0.46 | near the usual relationship |
| 2025-07-09 | 92.89 | 136.06 | -0.56 | KLAC ahead |
| 2025-07-08 | 92.03 | 135.47 | -0.58 | KLAC ahead |
| 2025-07-07 | 89.64 | 134.50 | -0.66 | KLAC ahead |
| 2025-07-03 | 92.54 | 136.26 | -0.57 | KLAC ahead |
| 2025-07-02 | 89.95 | 135.75 | -0.68 | KLAC ahead |
| 2025-07-01 | 88.20 | 132.47 | -0.66 | KLAC ahead |
| 2025-06-30 | 90.82 | 132.01 | -0.50 | KLAC ahead |
| 2025-06-27 | 88.80 | 131.15 | -0.57 | KLAC ahead |
| 2025-06-26 | 91.50 | 133.07 | -0.50 | KLAC ahead |
| 2025-06-25 | 87.17 | 131.68 | -0.67 | KLAC ahead |
| 2025-06-24 | 82.42 | 131.02 | -0.91 | KLAC ahead |
| 2025-06-23 | 82.09 | 126.20 | -0.75 | KLAC ahead |
| 2025-06-20 | 82.66 | 125.27 | -0.68 | KLAC ahead |
| 2025-06-18 | 83.77 | 128.39 | -0.73 | KLAC ahead |
| 2025-06-17 | 81.21 | 131.61 | -0.99 | KLAC ahead |
| 2025-06-16 | 82.22 | 131.52 | -0.92 | KLAC ahead |
| 2025-06-13 | 78.76 | 127.88 | -0.99 | KLAC ahead |
| 2025-06-12 | 82.41 | 128.96 | -0.82 | KLAC ahead |
| 2025-06-11 | 82.98 | 128.52 | -0.77 | KLAC ahead |
| 2025-06-10 | 83.50 | 126.24 | -0.65 | KLAC ahead |
| 2025-06-09 | 82.65 | 122.22 | -0.55 | KLAC ahead |
| 2025-06-06 | 81.18 | 119.08 | -0.51 | KLAC ahead |
| 2025-06-05 | 81.09 | 116.71 | -0.42 | near the usual relationship |
| 2025-06-04 | 83.10 | 115.26 | -0.24 | near the usual relationship |
| 2025-06-03 | 81.95 | 114.34 | -0.26 | near the usual relationship |
| 2025-06-02 | 78.16 | 112.37 | -0.39 | near the usual relationship |
| 2025-05-30 | 76.99 | 111.55 | -0.42 | near the usual relationship |
| 2025-05-29 | 80.95 | 114.07 | -0.29 | near the usual relationship |
| 2025-05-28 | 79.66 | 114.59 | -0.37 | near the usual relationship |
| 2025-05-27 | 82.65 | 116.29 | -0.27 | near the usual relationship |
| 2025-05-23 | 79.87 | 111.59 | -0.23 | near the usual relationship |
| 2025-05-22 | 80.30 | 113.12 | -0.26 | near the usual relationship |
| 2025-05-21 | 80.99 | 114.80 | -0.28 | near the usual relationship |
| 2025-05-20 | 80.88 | 116.47 | -0.34 | near the usual relationship |
| 2025-05-19 | 80.81 | 115.99 | -0.32 | near the usual relationship |
| 2025-05-16 | 80.02 | 116.60 | -0.38 | near the usual relationship |
| 2025-05-15 | 80.24 | 118.79 | -0.44 | near the usual relationship |
| 2025-05-14 | 82.15 | 118.64 | -0.33 | near the usual relationship |
| 2025-05-13 | 80.32 | 117.30 | -0.37 | near the usual relationship |
| 2025-05-12 | 79.17 | 112.08 | -0.24 | near the usual relationship |
| 2025-05-09 | 71.84 | 103.34 | -0.30 | near the usual relationship |
| 2025-05-08 | 71.86 | 103.66 | -0.30 | near the usual relationship |
| 2025-05-07 | 70.87 | 102.33 | -0.30 | near the usual relationship |
| 2025-05-06 | 71.05 | 100.13 | -0.20 | near the usual relationship |
| 2025-05-05 | 72.23 | 102.18 | -0.21 | near the usual relationship |
| 2025-05-02 | 72.93 | 102.89 | -0.19 | near the usual relationship |
| 2025-05-01 | 70.42 | 99.67 | -0.20 | near the usual relationship |
| 2025-04-30 | 65.48 | 103.56 | -0.66 | KLAC ahead |
| 2025-04-29 | 66.01 | 101.39 | -0.53 | KLAC ahead |
| 2025-04-28 | 65.98 | 102.24 | -0.56 | KLAC ahead |
| 2025-04-25 | 65.65 | 102.37 | -0.59 | KLAC ahead |
| 2025-04-24 | 64.65 | 101.61 | -0.61 | KLAC ahead |
| 2025-04-23 | 60.41 | 96.84 | -0.69 | KLAC ahead |
| 2025-04-22 | 56.12 | 93.79 | -0.86 | KLAC ahead |
| 2025-04-21 | 53.06 | 91.49 | -0.98 | KLAC ahead |
| 2025-04-17 | 56.29 | 93.50 | -0.83 | KLAC ahead |
| 2025-04-16 | 56.45 | 94.65 | -0.86 | KLAC ahead |
| 2025-04-15 | 57.56 | 99.66 | -0.99 | KLAC ahead |
| 2025-04-14 | 57.15 | 98.74 | -0.98 | KLAC ahead |
| 2025-04-11 | 56.19 | 98.78 | -1.05 | KLAC ahead |
| 2025-04-10 | 56.44 | 96.79 | -0.95 | KLAC ahead |
| 2025-04-09 | 64.18 | 103.65 | -0.70 | KLAC ahead |
| 2025-04-08 | 52.32 | 88.36 | -0.88 | KLAC ahead |
| 2025-04-07 | 53.78 | 89.11 | -0.81 | KLAC ahead |
| 2025-04-04 | 51.49 | 84.97 | -0.79 | KLAC ahead |
| 2025-04-03 | 54.88 | 91.50 | -0.83 | KLAC ahead |
| 2025-04-02 | 68.76 | 101.13 | -0.32 | near the usual relationship |
| 2025-04-01 | 64.85 | 100.58 | -0.53 | KLAC ahead |
| 2025-03-31 | 66.11 | 100.19 | -0.44 | near the usual relationship |
| 2025-03-28 | 66.91 | 99.27 | -0.35 | near the usual relationship |
| 2025-03-27 | 69.12 | 103.17 | -0.37 | near the usual relationship |
| 2025-03-26 | 72.78 | 103.98 | -0.20 | near the usual relationship |
| 2025-03-25 | 77.00 | 106.39 | -0.06 | near the usual relationship |
| 2025-03-24 | 78.09 | 107.25 | -0.03 | near the usual relationship |
| 2025-03-21 | 69.47 | 104.12 | -0.38 | near the usual relationship |
| 2025-03-20 | 69.95 | 105.59 | -0.41 | near the usual relationship |
| 2025-03-19 | 71.03 | 106.06 | -0.36 | near the usual relationship |
| 2025-03-18 | 66.56 | 104.64 | -0.56 | KLAC ahead |
| 2025-03-17 | 68.20 | 105.86 | -0.51 | KLAC ahead |
| 2025-03-14 | 65.46 | 105.08 | -0.65 | KLAC ahead |
| 2025-03-13 | 63.52 | 100.44 | -0.58 | KLAC ahead |
| 2025-03-12 | 68.53 | 100.28 | -0.28 | near the usual relationship |
| 2025-03-11 | 67.68 | 97.89 | -0.23 | near the usual relationship |
| 2025-03-10 | 63.94 | 99.98 | -0.54 | KLAC ahead |
| 2025-03-07 | 67.74 | 104.83 | -0.50 | KLAC ahead |
| 2025-03-06 | 66.21 | 102.01 | -0.48 | near the usual relationship |
| 2025-03-05 | 73.13 | 105.50 | -0.21 | near the usual relationship |
| 2025-03-04 | 70.82 | 103.02 | -0.25 | near the usual relationship |
| 2025-03-03 | 69.50 | 101.86 | -0.27 | near the usual relationship |
| 2025-02-28 | 76.54 | 104.47 | +0.01 | near the usual relationship |
| 2025-02-27 | 76.27 | 103.04 | +0.06 | near the usual relationship |
| 2025-02-26 | 79.81 | 108.84 | +0.02 | near the usual relationship |
| 2025-02-25 | 77.50 | 106.85 | -0.02 | near the usual relationship |
| 2025-02-24 | 81.67 | 108.70 | +0.12 | near the usual relationship |
| 2025-02-21 | 84.13 | 111.17 | +0.15 | near the usual relationship |
| 2025-02-20 | 87.79 | 114.61 | +0.21 | near the usual relationship |
| 2025-02-19 | 87.94 | 114.18 | +0.23 | near the usual relationship |
| 2025-02-18 | 90.28 | 111.75 | +0.42 | near the usual relationship |
| 2025-02-14 | 88.36 | 110.64 | +0.38 | near the usual relationship |
| 2025-02-13 | 88.02 | 112.64 | +0.29 | near the usual relationship |
| 2025-02-12 | 88.87 | 110.62 | +0.41 | near the usual relationship |
| 2025-02-11 | 89.08 | 111.81 | +0.38 | near the usual relationship |
| 2025-02-10 | 95.35 | 110.75 | +0.68 | COHR ahead |
| 2025-02-07 | 97.62 | 110.20 | +0.80 | COHR ahead |
| 2025-02-06 | 102.27 | 112.28 | +0.92 | COHR ahead |
| 2025-02-05 | 91.72 | 111.88 | +0.51 | COHR ahead |
| 2025-02-04 | 89.32 | 110.43 | +0.46 | near the usual relationship |
| 2025-02-03 | 89.08 | 109.09 | +0.50 | COHR ahead |
| 2025-01-31 | 92.12 | 108.80 | +0.65 | COHR ahead |
| 2025-01-30 | 91.30 | 109.42 | +0.60 | COHR ahead |
| 2025-01-29 | 87.12 | 105.08 | +0.58 | COHR ahead |
| 2025-01-28 | 83.98 | 103.60 | +0.50 | COHR ahead |
| 2025-01-27 | 82.79 | 103.57 | +0.45 | near the usual relationship |
| 2025-01-24 | 102.14 | 110.51 | +1.02 | COHR ahead |
| 2025-01-23 | 109.70 | 112.15 | +1.25 | COHR ahead |
| 2025-01-22 | 109.91 | 113.76 | +1.21 | COHR ahead |
| 2025-01-21 | 105.06 | 113.08 | +1.07 | COHR ahead |
| 2025-01-17 | 100.06 | 111.64 | +0.94 | COHR ahead |
| 2025-01-16 | 97.39 | 110.13 | +0.89 | COHR ahead |
| 2025-01-15 | 98.19 | 105.56 | +1.09 | COHR ahead |
| 2025-01-14 | 94.68 | 103.35 | +1.04 | COHR ahead |
| 2025-01-13 | 93.71 | 101.84 | +1.07 | COHR ahead |
| 2025-01-10 | 91.49 | 100.67 | +1.03 | COHR ahead |
| 2025-01-08 | 95.35 | 101.13 | +1.18 | COHR ahead |
| 2025-01-07 | 99.19 | 101.59 | +1.33 | COHR ahead |
| 2025-01-06 | 102.78 | 101.74 | +1.47 | COHR ahead |
| 2025-01-03 | 108.15 | 96.83 | +1.88 | COHR ahead |
| 2025-01-02 | 102.40 | 93.82 | +1.81 | COHR ahead |
| 2024-12-31 | 96.44 | 92.87 | +1.63 | COHR ahead |
| 2024-12-30 | 96.55 | 93.39 | +1.63 | COHR ahead |
| 2024-12-27 | 98.74 | 95.03 | +1.66 | COHR ahead |
| 2024-12-26 | 101.39 | 95.58 | +1.77 | COHR ahead |
| 2024-12-24 | 101.58 | 95.87 | +1.78 | COHR ahead |
| 2024-12-23 | 100.80 | 95.50 | +1.78 | COHR ahead |
| 2024-12-20 | 99.43 | 92.76 | +1.86 | COHR ahead |
| 2024-12-19 | 97.91 | 91.70 | +1.87 | COHR ahead |
| 2024-12-18 | 99.08 | 92.96 | +1.88 | COHR ahead |
| 2024-12-17 | 105.15 | 96.52 | +1.99 | COHR ahead |
| 2024-12-16 | 109.79 | 96.70 | +2.19 | COHR ahead |
| 2024-12-13 | 108.56 | 96.35 | +2.19 | COHR ahead |
| 2024-12-12 | 105.96 | 95.30 | +2.16 | COHR ahead |
| 2024-12-11 | 105.71 | 95.63 | +2.17 | COHR ahead |
| 2024-12-10 | 102.02 | 94.60 | +2.09 | COHR ahead |
| 2024-12-09 | 105.82 | 96.15 | +2.20 | COHR ahead |
| 2024-12-06 | 113.24 | 95.55 | +2.56 | COHR ahead |
| 2024-12-05 | 110.62 | 94.71 | +2.54 | COHR ahead |
| 2024-12-04 | 114.04 | 98.19 | +2.55 | COHR ahead |
| 2024-12-03 | 108.46 | 98.11 | +2.37 | COHR ahead |
| 2024-12-02 | 105.49 | 98.16 | +2.27 | COHR ahead |
| 2024-11-29 | 101.96 | 95.36 | +2.28 | COHR ahead |
| 2024-11-27 | 99.86 | 93.16 | +2.32 | COHR ahead |
| 2024-11-26 | 102.86 | 93.07 | +2.49 | COHR ahead |
| 2024-11-25 | 101.60 | 95.01 | +2.37 | COHR ahead |
| 2024-11-22 | 107.24 | 94.26 | +2.69 | COHR ahead |
| 2024-11-21 | 107.62 | 93.31 | +2.80 | COHR ahead |
| 2024-11-20 | 105.24 | 90.91 | +2.87 | COHR ahead |
| 2024-11-19 | 106.13 | 90.74 | +2.97 | COHR ahead |
| 2024-11-18 | 97.07 | 91.41 | +2.55 | COHR ahead |
| 2024-11-15 | 96.82 | 90.56 | +2.62 | COHR ahead |
| 2024-11-14 | 101.81 | 95.06 | +2.67 | COHR ahead |
| 2024-11-13 | 104.56 | 94.99 | +2.85 | COHR ahead |
| 2024-11-12 | 105.87 | 97.98 | +2.80 | COHR ahead |
| 2024-11-11 | 106.56 | 98.16 | +2.88 | COHR ahead |
| 2024-11-08 | 112.00 | 101.31 | +3.03 | COHR ahead |
| 2024-11-07 | 111.42 | 101.12 | +3.07 | COHR ahead |
| 2024-11-06 | 101.22 | 98.69 | +2.74 | COHR ahead |
| 2024-11-05 | 95.26 | 98.79 | +2.45 | COHR ahead |
| 2024-11-04 | 92.55 | 97.77 | +2.38 | COHR ahead |
| 2024-11-01 | 93.94 | 98.65 | +2.44 | COHR ahead |
| 2024-10-31 | 94.11 | 98.19 | +2.51 | COHR ahead |
| 2024-10-30 | 98.93 | 101.96 | +2.61 | COHR ahead |
| 2024-10-29 | 100.31 | 102.61 | +2.70 | COHR ahead |
| 2024-10-28 | 98.12 | 99.39 | +2.79 | COHR ahead |
| 2024-10-25 | 97.57 | 99.20 | +2.82 | COHR ahead |
| 2024-10-24 | 98.45 | 98.18 | +2.99 | COHR ahead |
| 2024-10-23 | 99.58 | 97.95 | +3.13 | COHR ahead |
| 2024-10-22 | 98.51 | 98.76 | +3.09 | COHR ahead |
| 2024-10-21 | 100.21 | 99.28 | +3.23 | COHR ahead |
| 2024-10-18 | 100.00 | 100.00 | +3.24 | COHR ahead |
One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Jan 27, 2025 (COHR -18.9%, KLAC -6.3%); Aug 14, 2025 (COHR -19.6%, KLAC +0.6%); Nov 6, 2025 (COHR +18.3%, KLAC -1.7%); Jan 30, 2026 (COHR -1.7%, KLAC -15.2%). Upcoming earnings: KLAC Oct 28, 2026 (after-hours); COHR Nov 4, 2026 (after-hours).
Paired trades
The shared paper book and the replay, kept apart
Forward paper record
No paper position on this pair yet.
Historical simulation (a diagnostic, same rules)
No simulated trade through Oct 20, 2026: the pair rarely passed every test while 2 standard deviations apart.
Per $10,000 a leg. A replay on today's companies cannot prove an edge.
The companies
COHR and KLAC at a glance
COHR Coherent Corp.
- Listing
- NYSE · SEC CIK 820318
- Industry
- Electronic Components · SIC 3827 Optical Instruments & Lenses
- Market value
- $45.7B
- Price history
- 1,035 daily closes, Sep 8, 2022 to Oct 22, 2026
KLAC KLA Corporation
- Listing
- Nasdaq · SEC CIK 319201
- Industry
- Electronic Components · SIC 3827 Optical Instruments & Lenses
- Market value
- $217.2B
- Price history
- 2,521 daily closes, Oct 12, 2016 to Oct 22, 2026
Daily prices: Nasdaq.com. Filings and industry codes: SEC EDGAR. Earnings dates: Nasdaq earnings calendar.
Related
All pairs →Other rivals of COHR and KLAC
| Pair | Status | Ahead now | Industry |
|---|---|---|---|
| KLAC / NVMI | Watchlist | KLAC by 1.01 sd | SIC 3827 Optical Instruments & Lenses |
| COHR / NVMI | Watchlist | COHR by 0.35 sd | SIC 3827 Optical Instruments & Lenses |
Follow the research behind the paper book
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Explore the private betaPaper only: hypothetical paired positions with modelled costs. No broker, no orders, no real money. A historical simulation is a diagnostic, not proof of an edge. Not investment advice.
