Ciena Corporation vs Fabrinet
WatchlistCIEN / FNPrices through Oct 22, 2026
Why these are rivals: #1 and #2 by market value ($49B vs $13B) with SEC SIC 3661 (Telephone & Telegraph Apparatus).
Rivals, but right now the price gap does not have a measured habit of closing, so there is no paper idea, whatever the gap.
- Mean reversion: ADF t-statistic of the spread: -1.46 (needs <= -2.873 (5% critical value))
Business leadership
CIEN is the larger business
Annual revenue reported to the SEC. Scale, not market share.
| Year | CIEN | FN | Larger |
|---|---|---|---|
| 2025 | $4.8B | $4.6B | CIEN |
| 2024 | $4.0B | $3.4B | CIEN |
| 2023 | $4.4B | $2.9B | CIEN |
| 2022 | $3.6B | - | - |
| 2021 | $3.6B | $2.3B | CIEN |
| 2020 | $3.5B | $1.9B | CIEN |
CIEN led in every year with figures for both. Market value: CIEN $48.8B, FN $13.0B.
Stock leadership
CIEN is ahead now
Measured against the pair's own last 252 trading days.
CIEN leads FN by 1.55 standard deviations: +50.3% over its usual price ratio. 0 lead switches in the last year.
| Price change | 3 mo | 6 mo | 12 mo |
|---|---|---|---|
| CIEN | -17.5% | -37.5% | +90.1% |
| FN | -33.3% | -53.9% | -23.6% |
Relationship
Not a measured twin today
Only these tests can make a pair tradable on paper.
- Pass
- Aligned sessions: 2521 (needs >= 254)
- Pass
- Co-movement: daily return correlation, 252 sessions: 0.70 (needs >= 0.60)
- Fail
- Mean reversion: ADF t-statistic of the spread: -1.46 (needs <= -2.873 (5% critical value))
- Pass
- Speed: half-life of the spread, sessions: 54.29 (needs <= 63)
- Data
- Both stocks current
The twins over two years
Prices side by side, and the gap between them
CIEN Ciena Corporation FN FabrinetPrice 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: CIEN relative to FN, against the 252 sessions before each day. Above 0: CIEN ahead; below 0: FN ahead. Lines at +/-2 (idea) and +/-4 (stop).
Data table (504 sessions)
| Date | CIEN index | FN index | z | Ahead |
|---|---|---|---|---|
| 2026-10-22 | 493.86 | 130.72 | +1.55 | CIEN ahead |
| 2026-10-21 | 553.10 | 146.51 | +1.56 | CIEN ahead |
| 2026-10-20 | 523.42 | 146.28 | +1.36 | CIEN ahead |
| 2026-10-19 | 526.86 | 149.24 | +1.32 | CIEN ahead |
| 2026-10-16 | 509.31 | 149.58 | +1.19 | CIEN ahead |
| 2026-10-15 | 545.72 | 158.51 | +1.24 | CIEN ahead |
| 2026-10-14 | 550.44 | 161.69 | +1.21 | CIEN ahead |
| 2026-10-13 | 612.89 | 176.04 | +1.30 | CIEN ahead |
| 2026-10-12 | 619.94 | 187.80 | +1.11 | CIEN ahead |
| 2026-10-09 | 688.46 | 200.10 | +1.27 | CIEN ahead |
| 2026-10-08 | 651.97 | 200.53 | +1.07 | CIEN ahead |
| 2026-10-07 | 683.38 | 204.92 | +1.17 | CIEN ahead |
| 2026-10-06 | 679.09 | 201.28 | +1.22 | CIEN ahead |
| 2026-10-05 | 596.49 | 186.75 | +1.03 | CIEN ahead |
| 2026-10-02 | 599.02 | 190.80 | +0.97 | CIEN ahead |
| 2026-10-01 | 580.35 | 185.76 | +0.96 | CIEN ahead |
| 2026-09-30 | 538.53 | 174.58 | +0.92 | CIEN ahead |
| 2026-09-29 | 543.27 | 174.52 | +0.96 | CIEN ahead |
| 2026-09-28 | 526.85 | 168.69 | +0.98 | CIEN ahead |
| 2026-09-25 | 546.32 | 171.75 | +1.05 | CIEN ahead |
| 2026-09-24 | 548.65 | 163.92 | +1.24 | CIEN ahead |
| 2026-09-23 | 544.79 | 164.95 | +1.20 | CIEN ahead |
| 2026-09-22 | 564.15 | 166.16 | +1.30 | CIEN ahead |
| 2026-09-21 | 560.17 | 165.24 | +1.30 | CIEN ahead |
| 2026-09-18 | 533.90 | 159.88 | +1.26 | CIEN ahead |
| 2026-09-17 | 526.94 | 156.74 | +1.29 | CIEN ahead |
| 2026-09-16 | 521.20 | 161.58 | +1.16 | CIEN ahead |
| 2026-09-15 | 511.76 | 154.27 | +1.26 | CIEN ahead |
| 2026-09-14 | 489.27 | 157.42 | +1.04 | CIEN ahead |
| 2026-09-11 | 535.04 | 170.60 | +1.08 | CIEN ahead |
| 2026-09-10 | 512.11 | 166.22 | +1.02 | CIEN ahead |
| 2026-09-09 | 517.37 | 172.11 | +0.94 | CIEN ahead |
| 2026-09-08 | 522.41 | 171.31 | +1.00 | CIEN ahead |
| 2026-09-04 | 491.35 | 167.64 | +0.87 | CIEN ahead |
| 2026-09-03 | 485.93 | 162.54 | +0.94 | CIEN ahead |
| 2026-09-02 | 542.11 | 162.68 | +1.30 | CIEN ahead |
| 2026-09-01 | 551.55 | 165.45 | +1.31 | CIEN ahead |
| 2026-08-31 | 585.95 | 169.92 | +1.42 | CIEN ahead |
| 2026-08-28 | 579.27 | 170.50 | +1.37 | CIEN ahead |
| 2026-08-27 | 612.05 | 178.06 | +1.42 | CIEN ahead |
| 2026-08-26 | 618.44 | 180.15 | +1.42 | CIEN ahead |
| 2026-08-25 | 593.39 | 177.57 | +1.34 | CIEN ahead |
| 2026-08-24 | 569.34 | 173.29 | +1.30 | CIEN ahead |
| 2026-08-21 | 605.83 | 179.68 | +1.38 | CIEN ahead |
| 2026-08-20 | 600.77 | 183.06 | +1.31 | CIEN ahead |
| 2026-08-19 | 611.46 | 187.04 | +1.30 | CIEN ahead |
| 2026-08-18 | 620.76 | 198.58 | +1.17 | CIEN ahead |
| 2026-08-17 | 681.43 | 246.31 | +0.80 | CIEN ahead |
| 2026-08-14 | 656.31 | 234.64 | +0.84 | CIEN ahead |
| 2026-08-13 | 677.77 | 233.10 | +0.96 | CIEN ahead |
| 2026-08-12 | 661.33 | 235.32 | +0.87 | CIEN ahead |
| 2026-08-11 | 593.19 | 216.39 | +0.80 | CIEN ahead |
| 2026-08-10 | 593.45 | 216.88 | +0.80 | CIEN ahead |
| 2026-08-07 | 631.24 | 231.41 | +0.80 | CIEN ahead |
| 2026-08-06 | 618.03 | 223.83 | +0.84 | CIEN ahead |
| 2026-08-05 | 625.79 | 214.89 | +1.00 | CIEN ahead |
| 2026-08-04 | 629.31 | 218.51 | +0.97 | CIEN ahead |
| 2026-08-03 | 598.13 | 187.61 | +1.27 | CIEN ahead |
| 2026-07-31 | 577.15 | 179.17 | +1.31 | CIEN ahead |
| 2026-07-30 | 569.52 | 180.78 | +1.25 | CIEN ahead |
| 2026-07-29 | 505.69 | 170.56 | +1.09 | CIEN ahead |
| 2026-07-28 | 536.52 | 185.05 | +1.03 | CIEN ahead |
| 2026-07-27 | 577.48 | 193.74 | +1.11 | CIEN ahead |
| 2026-07-24 | 598.44 | 195.89 | +1.19 | CIEN ahead |
| 2026-07-23 | 623.80 | 213.04 | +1.08 | CIEN ahead |
| 2026-07-22 | 607.93 | 211.37 | +1.04 | CIEN ahead |
| 2026-07-21 | 625.64 | 217.00 | +1.05 | CIEN ahead |
| 2026-07-20 | 579.78 | 203.38 | +1.03 | CIEN ahead |
| 2026-07-17 | 573.11 | 196.85 | +1.09 | CIEN ahead |
| 2026-07-16 | 595.15 | 189.36 | +1.31 | CIEN ahead |
| 2026-07-15 | 640.53 | 200.25 | +1.37 | CIEN ahead |
| 2026-07-14 | 684.11 | 198.66 | +1.58 | CIEN ahead |
| 2026-07-13 | 681.83 | 195.31 | +1.62 | CIEN ahead |
| 2026-07-10 | 705.22 | 193.86 | +1.75 | CIEN ahead |
| 2026-07-09 | 707.70 | 198.66 | +1.71 | CIEN ahead |
| 2026-07-08 | 674.99 | 197.54 | +1.61 | CIEN ahead |
| 2026-07-07 | 641.22 | 192.77 | +1.55 | CIEN ahead |
| 2026-07-06 | 664.06 | 206.05 | +1.47 | CIEN ahead |
| 2026-07-02 | 646.66 | 205.58 | +1.42 | CIEN ahead |
| 2026-07-01 | 707.85 | 225.16 | +1.43 | CIEN ahead |
| 2026-06-30 | 750.90 | 231.29 | +1.52 | CIEN ahead |
| 2026-06-29 | 733.09 | 217.36 | +1.64 | CIEN ahead |
| 2026-06-26 | 733.97 | 215.95 | +1.68 | CIEN ahead |
| 2026-06-25 | 741.91 | 233.64 | +1.50 | CIEN ahead |
| 2026-06-24 | 709.49 | 233.80 | +1.39 | CIEN ahead |
| 2026-06-23 | 703.89 | 240.12 | +1.31 | CIEN ahead |
| 2026-06-22 | 704.62 | 253.93 | +1.17 | CIEN ahead |
| 2026-06-18 | 655.47 | 236.10 | +1.18 | CIEN ahead |
| 2026-06-17 | 668.48 | 240.47 | +1.19 | CIEN ahead |
| 2026-06-16 | 658.66 | 241.97 | +1.15 | CIEN ahead |
| 2026-06-15 | 709.34 | 261.53 | +1.14 | CIEN ahead |
| 2026-06-12 | 682.66 | 251.42 | +1.16 | CIEN ahead |
| 2026-06-11 | 681.49 | 239.59 | +1.29 | CIEN ahead |
| 2026-06-10 | 665.31 | 238.77 | +1.25 | CIEN ahead |
| 2026-06-09 | 672.49 | 241.13 | +1.26 | CIEN ahead |
| 2026-06-08 | 714.33 | 256.65 | +1.26 | CIEN ahead |
| 2026-06-05 | 747.30 | 255.64 | +1.41 | CIEN ahead |
| 2026-06-04 | 819.88 | 294.12 | +1.29 | CIEN ahead |
| 2026-06-03 | 949.59 | 298.33 | +1.66 | CIEN ahead |
| 2026-06-02 | 959.74 | 288.50 | +1.80 | CIEN ahead |
| 2026-06-01 | 871.90 | 256.09 | +1.89 | CIEN ahead |
| 2026-05-29 | 888.15 | 269.18 | +1.82 | CIEN ahead |
| 2026-05-28 | 872.77 | 274.85 | +1.73 | CIEN ahead |
| 2026-05-27 | 890.98 | 282.65 | +1.73 | CIEN ahead |
| 2026-05-26 | 922.07 | 280.13 | +1.87 | CIEN ahead |
| 2026-05-22 | 893.53 | 289.63 | +1.71 | CIEN ahead |
| 2026-05-21 | 898.87 | 289.39 | +1.75 | CIEN ahead |
| 2026-05-20 | 849.17 | 272.49 | +1.78 | CIEN ahead |
| 2026-05-19 | 829.51 | 278.89 | +1.66 | CIEN ahead |
| 2026-05-18 | 802.89 | 288.15 | +1.49 | CIEN ahead |
| 2026-05-15 | 848.71 | 297.11 | +1.57 | CIEN ahead |
| 2026-05-14 | 905.51 | 307.16 | +1.68 | CIEN ahead |
| 2026-05-13 | 884.59 | 286.42 | +1.84 | CIEN ahead |
| 2026-05-12 | 883.44 | 261.08 | +2.13 | CIEN ahead |
| 2026-05-11 | 890.05 | 267.27 | +2.11 | CIEN ahead |
| 2026-05-08 | 838.99 | 255.65 | +2.10 | CIEN ahead |
| 2026-05-07 | 824.67 | 257.64 | +2.05 | CIEN ahead |
| 2026-05-06 | 882.89 | 279.44 | +2.03 | CIEN ahead |
| 2026-05-05 | 833.84 | 271.71 | +1.97 | CIEN ahead |
| 2026-05-04 | 824.29 | 295.37 | +1.70 | CIEN ahead |
| 2026-05-01 | 819.36 | 290.73 | +1.75 | CIEN ahead |
| 2026-04-30 | 807.56 | 281.24 | +1.82 | CIEN ahead |
| 2026-04-29 | 727.67 | 264.78 | +1.71 | CIEN ahead |
| 2026-04-28 | 725.07 | 262.42 | +1.74 | CIEN ahead |
| 2026-04-27 | 775.05 | 281.77 | +1.74 | CIEN ahead |
| 2026-04-24 | 797.18 | 296.35 | +1.69 | CIEN ahead |
| 2026-04-23 | 789.61 | 283.71 | +1.82 | CIEN ahead |
| 2026-04-22 | 763.77 | 283.95 | +1.73 | CIEN ahead |
| 2026-04-21 | 774.42 | 286.20 | +1.77 | CIEN ahead |
| 2026-04-20 | 770.35 | 288.05 | +1.75 | CIEN ahead |
| 2026-04-17 | 776.72 | 283.88 | +1.84 | CIEN ahead |
| 2026-04-16 | 757.95 | 276.78 | +1.86 | CIEN ahead |
| 2026-04-15 | 728.24 | 282.20 | +1.69 | CIEN ahead |
| 2026-04-14 | 715.12 | 280.50 | +1.67 | CIEN ahead |
| 2026-04-13 | 734.58 | 283.88 | +1.73 | CIEN ahead |
| 2026-04-10 | 759.25 | 272.46 | +2.00 | CIEN ahead |
| 2026-04-09 | 746.03 | 254.41 | +2.20 | CIEN ahead |
| 2026-04-08 | 756.18 | 251.08 | +2.32 | CIEN ahead |
| 2026-04-07 | 685.57 | 229.50 | +2.32 | CIEN ahead |
| 2026-04-06 | 664.72 | 228.11 | +2.27 | CIEN ahead |
| 2026-04-02 | 685.38 | 229.60 | +2.39 | CIEN ahead |
| 2026-04-01 | 635.83 | 220.14 | +2.31 | CIEN ahead |
| 2026-03-31 | 594.26 | 214.60 | +2.19 | CIEN ahead |
| 2026-03-30 | 558.70 | 202.40 | +2.21 | CIEN ahead |
| 2026-03-27 | 614.74 | 227.13 | +2.17 | CIEN ahead |
| 2026-03-26 | 593.89 | 226.20 | +2.09 | CIEN ahead |
| 2026-03-25 | 669.98 | 251.84 | +2.16 | CIEN ahead |
| 2026-03-24 | 657.25 | 247.27 | +2.19 | CIEN ahead |
| 2026-03-23 | 624.37 | 224.87 | +2.38 | CIEN ahead |
| 2026-03-20 | 587.62 | 208.32 | +2.48 | CIEN ahead |
| 2026-03-19 | 631.53 | 222.51 | +2.54 | CIEN ahead |
| 2026-03-18 | 589.71 | 205.92 | +2.62 | CIEN ahead |
| 2026-03-17 | 566.43 | 205.75 | +2.51 | CIEN ahead |
| 2026-03-16 | 556.99 | 211.02 | +2.38 | CIEN ahead |
| 2026-03-13 | 516.42 | 206.62 | +2.20 | CIEN ahead |
| 2026-03-12 | 515.58 | 211.01 | +2.14 | CIEN ahead |
| 2026-03-11 | 520.36 | 215.76 | +2.12 | CIEN ahead |
| 2026-03-10 | 516.39 | 223.45 | +1.98 | CIEN ahead |
| 2026-03-09 | 487.59 | 217.07 | +1.88 | CIEN ahead |
| 2026-03-06 | 450.28 | 201.37 | +1.88 | CIEN ahead |
| 2026-03-05 | 458.14 | 224.04 | +1.54 | CIEN ahead |
| 2026-03-04 | 525.87 | 232.03 | +1.98 | CIEN ahead |
| 2026-03-03 | 509.83 | 227.57 | +1.95 | CIEN ahead |
| 2026-03-02 | 541.45 | 239.23 | +2.01 | CIEN ahead |
| 2026-02-27 | 533.75 | 224.52 | +2.25 | CIEN ahead |
| 2026-02-26 | 522.21 | 231.44 | +2.06 | CIEN ahead |
| 2026-02-25 | 540.84 | 253.47 | +1.84 | CIEN ahead |
| 2026-02-24 | 524.57 | 241.08 | +1.94 | CIEN ahead |
| 2026-02-23 | 527.84 | 237.31 | +2.06 | CIEN ahead |
| 2026-02-20 | 512.70 | 224.73 | +2.20 | CIEN ahead |
| 2026-02-19 | 487.39 | 211.44 | +2.28 | CIEN ahead |
| 2026-02-18 | 475.98 | 208.12 | +2.27 | CIEN ahead |
| 2026-02-17 | 462.77 | 204.42 | +2.26 | CIEN ahead |
| 2026-02-13 | 465.21 | 203.91 | +2.32 | CIEN ahead |
| 2026-02-12 | 448.43 | 190.13 | +2.51 | CIEN ahead |
| 2026-02-11 | 455.00 | 191.56 | +2.58 | CIEN ahead |
| 2026-02-10 | 457.22 | 191.87 | +2.64 | CIEN ahead |
| 2026-02-09 | 443.41 | 206.52 | +2.17 | CIEN ahead |
| 2026-02-06 | 415.31 | 207.39 | +1.85 | CIEN ahead |
| 2026-02-05 | 387.23 | 182.17 | +2.16 | CIEN ahead |
| 2026-02-04 | 388.03 | 174.07 | +2.43 | CIEN ahead |
| 2026-02-03 | 423.27 | 184.57 | +2.61 | CIEN ahead |
| 2026-02-02 | 410.98 | 205.58 | +1.95 | CIEN ahead |
| 2026-01-30 | 385.44 | 201.40 | +1.75 | CIEN ahead |
| 2026-01-29 | 388.08 | 204.21 | +1.73 | CIEN ahead |
| 2026-01-28 | 393.85 | 206.16 | +1.77 | CIEN ahead |
| 2026-01-27 | 378.88 | 205.16 | +1.61 | CIEN ahead |
| 2026-01-26 | 355.47 | 195.10 | +1.56 | CIEN ahead |
| 2026-01-23 | 350.74 | 192.13 | +1.58 | CIEN ahead |
| 2026-01-22 | 352.10 | 193.56 | +1.58 | CIEN ahead |
| 2026-01-21 | 354.95 | 200.95 | +1.44 | CIEN ahead |
| 2026-01-20 | 369.22 | 198.57 | +1.72 | CIEN ahead |
| 2026-01-16 | 372.60 | 203.46 | +1.65 | CIEN ahead |
| 2026-01-15 | 373.17 | 204.75 | +1.64 | CIEN ahead |
| 2026-01-14 | 364.89 | 196.30 | +1.76 | CIEN ahead |
| 2026-01-13 | 377.19 | 201.22 | +1.83 | CIEN ahead |
| 2026-01-12 | 358.58 | 190.49 | +1.87 | CIEN ahead |
| 2026-01-09 | 352.92 | 184.03 | +1.99 | CIEN ahead |
| 2026-01-08 | 344.73 | 182.26 | +1.94 | CIEN ahead |
| 2026-01-07 | 396.86 | 193.61 | +2.42 | CIEN ahead |
| 2026-01-06 | 389.09 | 197.17 | +2.24 | CIEN ahead |
| 2026-01-05 | 353.44 | 188.01 | +1.99 | CIEN ahead |
| 2026-01-02 | 376.64 | 197.28 | +2.10 | CIEN ahead |
| 2025-12-31 | 357.98 | 187.34 | +2.12 | CIEN ahead |
| 2025-12-30 | 364.86 | 190.08 | +2.17 | CIEN ahead |
| 2025-12-29 | 365.83 | 194.26 | +2.09 | CIEN ahead |
| 2025-12-26 | 369.94 | 196.82 | +2.10 | CIEN ahead |
| 2025-12-24 | 367.79 | 198.23 | +2.04 | CIEN ahead |
| 2025-12-23 | 367.81 | 200.36 | +2.00 | CIEN ahead |
| 2025-12-22 | 362.39 | 198.98 | +1.97 | CIEN ahead |
| 2025-12-19 | 352.58 | 195.65 | +1.93 | CIEN ahead |
| 2025-12-18 | 322.53 | 186.18 | +1.70 | CIEN ahead |
| 2025-12-17 | 312.11 | 175.51 | +1.88 | CIEN ahead |
| 2025-12-16 | 321.20 | 185.65 | +1.73 | CIEN ahead |
| 2025-12-15 | 330.90 | 193.41 | +1.68 | CIEN ahead |
| 2025-12-12 | 334.36 | 193.77 | +1.75 | CIEN ahead |
| 2025-12-11 | 370.99 | 217.34 | +1.70 | CIEN ahead |
| 2025-12-10 | 339.58 | 212.59 | +1.30 | CIEN ahead |
| 2025-12-09 | 328.10 | 205.11 | +1.32 | CIEN ahead |
| 2025-12-08 | 325.93 | 202.05 | +1.39 | CIEN ahead |
| 2025-12-05 | 308.76 | 196.88 | +1.22 | CIEN ahead |
| 2025-12-04 | 299.60 | 194.13 | +1.13 | CIEN ahead |
| 2025-12-03 | 295.96 | 184.06 | +1.40 | CIEN ahead |
| 2025-12-02 | 309.96 | 181.71 | +1.79 | CIEN ahead |
| 2025-12-01 | 307.55 | 185.00 | +1.64 | CIEN ahead |
| 2025-11-28 | 312.58 | 189.04 | +1.62 | CIEN ahead |
| 2025-11-26 | 306.58 | 184.78 | +1.66 | CIEN ahead |
| 2025-11-25 | 300.38 | 176.81 | +1.83 | CIEN ahead |
| 2025-11-24 | 298.03 | 171.32 | +2.01 | CIEN ahead |
| 2025-11-21 | 272.86 | 160.67 | +1.87 | CIEN ahead |
| 2025-11-20 | 270.09 | 159.34 | +1.88 | CIEN ahead |
| 2025-11-19 | 288.96 | 171.46 | +1.86 | CIEN ahead |
| 2025-11-18 | 286.24 | 168.40 | +1.94 | CIEN ahead |
| 2025-11-17 | 293.56 | 171.44 | +2.01 | CIEN ahead |
| 2025-11-14 | 293.45 | 170.08 | +2.08 | CIEN ahead |
| 2025-11-13 | 297.28 | 165.61 | +2.37 | CIEN ahead |
| 2025-11-12 | 320.71 | 184.14 | +2.20 | CIEN ahead |
| 2025-11-11 | 317.51 | 184.88 | +2.13 | CIEN ahead |
| 2025-11-10 | 319.52 | 192.26 | +1.93 | CIEN ahead |
| 2025-11-07 | 305.01 | 184.81 | +1.90 | CIEN ahead |
| 2025-11-06 | 308.37 | 189.80 | +1.81 | CIEN ahead |
| 2025-11-05 | 299.72 | 200.36 | +1.26 | CIEN ahead |
| 2025-11-04 | 279.92 | 189.12 | +1.20 | CIEN ahead |
| 2025-11-03 | 290.16 | 182.29 | +1.70 | CIEN ahead |
| 2025-10-31 | 290.71 | 181.29 | +1.76 | CIEN ahead |
| 2025-10-30 | 289.24 | 180.23 | +1.79 | CIEN ahead |
| 2025-10-29 | 289.71 | 182.67 | +1.72 | CIEN ahead |
| 2025-10-28 | 280.18 | 180.05 | +1.61 | CIEN ahead |
| 2025-10-27 | 279.41 | 174.31 | +1.82 | CIEN ahead |
| 2025-10-24 | 274.07 | 173.24 | +1.75 | CIEN ahead |
| 2025-10-23 | 264.17 | 170.76 | +1.61 | CIEN ahead |
| 2025-10-22 | 251.77 | 164.69 | +1.54 | CIEN ahead |
| 2025-10-21 | 259.77 | 171.17 | +1.50 | CIEN ahead |
| 2025-10-20 | 264.99 | 167.70 | +1.79 | CIEN ahead |
| 2025-10-17 | 261.67 | 168.67 | +1.68 | CIEN ahead |
| 2025-10-16 | 261.41 | 169.72 | +1.65 | CIEN ahead |
| 2025-10-15 | 258.24 | 163.91 | +1.82 | CIEN ahead |
| 2025-10-14 | 252.29 | 154.41 | +2.09 | CIEN ahead |
| 2025-10-13 | 252.23 | 157.44 | +1.98 | CIEN ahead |
| 2025-10-10 | 238.70 | 148.93 | +2.00 | CIEN ahead |
| 2025-10-09 | 250.44 | 157.29 | +1.98 | CIEN ahead |
| 2025-10-08 | 244.39 | 157.78 | +1.80 | CIEN ahead |
| 2025-10-07 | 231.87 | 152.32 | +1.70 | CIEN ahead |
| 2025-10-06 | 234.58 | 152.37 | +1.80 | CIEN ahead |
| 2025-10-03 | 231.82 | 150.60 | +1.81 | CIEN ahead |
| 2025-10-02 | 233.68 | 152.07 | +1.82 | CIEN ahead |
| 2025-10-01 | 232.24 | 152.79 | +1.76 | CIEN ahead |
| 2025-09-30 | 222.98 | 150.04 | +1.61 | CIEN ahead |
| 2025-09-29 | 220.60 | 149.70 | +1.57 | CIEN ahead |
| 2025-09-26 | 217.25 | 147.68 | +1.57 | CIEN ahead |
| 2025-09-25 | 209.96 | 148.53 | +1.30 | CIEN ahead |
| 2025-09-24 | 211.88 | 150.88 | +1.26 | CIEN ahead |
| 2025-09-23 | 213.50 | 156.45 | +1.06 | CIEN ahead |
| 2025-09-22 | 213.24 | 160.26 | +0.89 | CIEN ahead |
| 2025-09-19 | 211.80 | 157.65 | +0.96 | CIEN ahead |
| 2025-09-18 | 211.30 | 155.55 | +1.05 | CIEN ahead |
| 2025-09-17 | 208.76 | 147.40 | +1.35 | CIEN ahead |
| 2025-09-16 | 210.44 | 146.30 | +1.47 | CIEN ahead |
| 2025-09-15 | 208.02 | 147.72 | +1.33 | CIEN ahead |
| 2025-09-12 | 200.95 | 147.31 | +1.12 | CIEN ahead |
| 2025-09-11 | 202.82 | 149.02 | +1.11 | CIEN ahead |
| 2025-09-10 | 198.78 | 153.31 | +0.78 | CIEN ahead |
| 2025-09-09 | 187.04 | 151.88 | +0.43 | near the usual relationship |
| 2025-09-08 | 182.15 | 152.53 | +0.23 | near the usual relationship |
| 2025-09-05 | 178.62 | 152.26 | +0.11 | near the usual relationship |
| 2025-09-04 | 178.97 | 149.02 | +0.28 | near the usual relationship |
| 2025-09-03 | 145.14 | 138.89 | -0.65 | FN ahead |
| 2025-09-02 | 143.26 | 138.14 | -0.69 | FN ahead |
| 2025-08-29 | 143.84 | 136.32 | -0.57 | FN ahead |
| 2025-08-28 | 149.84 | 146.10 | -0.75 | FN ahead |
| 2025-08-27 | 141.96 | 136.75 | -0.65 | FN ahead |
| 2025-08-26 | 140.04 | 136.06 | -0.69 | FN ahead |
| 2025-08-25 | 138.89 | 128.50 | -0.36 | near the usual relationship |
| 2025-08-22 | 137.47 | 121.12 | -0.04 | near the usual relationship |
| 2025-08-21 | 133.72 | 114.00 | +0.17 | near the usual relationship |
| 2025-08-20 | 132.62 | 115.35 | +0.05 | near the usual relationship |
| 2025-08-19 | 135.88 | 117.37 | +0.10 | near the usual relationship |
| 2025-08-18 | 140.72 | 134.61 | -0.52 | FN ahead |
| 2025-08-15 | 139.09 | 135.71 | -0.63 | FN ahead |
| 2025-08-14 | 139.94 | 132.53 | -0.44 | near the usual relationship |
| 2025-08-13 | 144.90 | 138.80 | -0.51 | FN ahead |
| 2025-08-12 | 147.56 | 143.33 | -0.58 | FN ahead |
| 2025-08-11 | 142.94 | 136.78 | -0.49 | near the usual relationship |
| 2025-08-08 | 145.51 | 141.55 | -0.58 | FN ahead |
| 2025-08-07 | 145.69 | 137.89 | -0.41 | near the usual relationship |
| 2025-08-06 | 144.36 | 136.80 | -0.41 | near the usual relationship |
| 2025-08-05 | 140.04 | 135.01 | -0.51 | FN ahead |
| 2025-08-04 | 141.85 | 135.61 | -0.45 | near the usual relationship |
| 2025-08-01 | 135.67 | 129.70 | -0.45 | near the usual relationship |
| 2025-07-31 | 142.11 | 133.21 | -0.33 | near the usual relationship |
| 2025-07-30 | 142.28 | 131.95 | -0.26 | near the usual relationship |
| 2025-07-29 | 139.40 | 132.01 | -0.37 | near the usual relationship |
| 2025-07-28 | 138.60 | 130.29 | -0.32 | near the usual relationship |
| 2025-07-25 | 135.62 | 127.10 | -0.30 | near the usual relationship |
| 2025-07-24 | 133.46 | 125.44 | -0.30 | near the usual relationship |
| 2025-07-23 | 132.79 | 125.59 | -0.33 | near the usual relationship |
| 2025-07-22 | 129.13 | 123.77 | -0.39 | near the usual relationship |
| 2025-07-21 | 130.83 | 127.36 | -0.47 | near the usual relationship |
| 2025-07-18 | 130.08 | 127.95 | -0.51 | FN ahead |
| 2025-07-17 | 129.82 | 126.89 | -0.46 | near the usual relationship |
| 2025-07-16 | 128.76 | 122.40 | -0.30 | near the usual relationship |
| 2025-07-15 | 126.45 | 124.05 | -0.46 | near the usual relationship |
| 2025-07-14 | 124.63 | 121.99 | -0.43 | near the usual relationship |
| 2025-07-11 | 119.01 | 119.92 | -0.57 | FN ahead |
| 2025-07-10 | 120.08 | 119.02 | -0.48 | near the usual relationship |
| 2025-07-09 | 121.43 | 117.36 | -0.34 | near the usual relationship |
| 2025-07-08 | 120.40 | 117.83 | -0.39 | near the usual relationship |
| 2025-07-07 | 122.65 | 117.96 | -0.30 | near the usual relationship |
| 2025-07-03 | 124.57 | 121.25 | -0.35 | near the usual relationship |
| 2025-07-02 | 121.72 | 118.85 | -0.35 | near the usual relationship |
| 2025-07-01 | 122.62 | 118.97 | -0.31 | near the usual relationship |
| 2025-06-30 | 124.49 | 121.26 | -0.32 | near the usual relationship |
| 2025-06-27 | 125.70 | 121.64 | -0.28 | near the usual relationship |
| 2025-06-26 | 124.77 | 123.01 | -0.36 | near the usual relationship |
| 2025-06-25 | 121.58 | 117.64 | -0.26 | near the usual relationship |
| 2025-06-24 | 121.46 | 113.78 | -0.10 | near the usual relationship |
| 2025-06-23 | 115.48 | 111.05 | -0.22 | near the usual relationship |
| 2025-06-20 | 114.08 | 109.53 | -0.20 | near the usual relationship |
| 2025-06-18 | 113.00 | 109.28 | -0.22 | near the usual relationship |
| 2025-06-17 | 112.43 | 106.49 | -0.12 | near the usual relationship |
| 2025-06-16 | 112.90 | 106.34 | -0.09 | near the usual relationship |
| 2025-06-13 | 110.45 | 100.85 | +0.06 | near the usual relationship |
| 2025-06-12 | 113.47 | 105.74 | -0.03 | near the usual relationship |
| 2025-06-11 | 110.55 | 100.07 | +0.11 | near the usual relationship |
| 2025-06-10 | 110.88 | 97.82 | +0.23 | near the usual relationship |
| 2025-06-09 | 110.91 | 95.81 | +0.33 | near the usual relationship |
| 2025-06-06 | 111.31 | 96.68 | +0.31 | near the usual relationship |
| 2025-06-05 | 111.82 | 97.61 | +0.29 | near the usual relationship |
| 2025-06-04 | 128.41 | 98.46 | +0.86 | CIEN ahead |
| 2025-06-03 | 127.45 | 98.70 | +0.83 | CIEN ahead |
| 2025-06-02 | 125.13 | 96.03 | +0.87 | CIEN ahead |
| 2025-05-30 | 122.55 | 95.82 | +0.80 | CIEN ahead |
| 2025-05-29 | 124.83 | 96.64 | +0.85 | CIEN ahead |
| 2025-05-28 | 126.59 | 95.38 | +0.97 | CIEN ahead |
| 2025-05-27 | 126.05 | 96.58 | +0.91 | CIEN ahead |
| 2025-05-23 | 122.79 | 94.76 | +0.88 | CIEN ahead |
| 2025-05-22 | 122.64 | 93.92 | +0.92 | CIEN ahead |
| 2025-05-21 | 122.33 | 93.40 | +0.94 | CIEN ahead |
| 2025-05-20 | 124.06 | 93.94 | +0.99 | CIEN ahead |
| 2025-05-19 | 123.97 | 93.72 | +1.00 | CIEN ahead |
| 2025-05-16 | 124.35 | 94.46 | +0.99 | CIEN ahead |
| 2025-05-15 | 122.15 | 92.00 | +1.03 | CIEN ahead |
| 2025-05-14 | 121.74 | 93.14 | +0.97 | CIEN ahead |
| 2025-05-13 | 123.36 | 93.54 | +1.02 | CIEN ahead |
| 2025-05-12 | 120.94 | 88.63 | +1.17 | CIEN ahead |
| 2025-05-09 | 114.40 | 83.38 | +1.21 | CIEN ahead |
| 2025-05-08 | 114.47 | 85.63 | +1.10 | CIEN ahead |
| 2025-05-07 | 112.26 | 86.38 | +0.99 | CIEN ahead |
| 2025-05-06 | 111.22 | 84.29 | +1.06 | CIEN ahead |
| 2025-05-05 | 111.60 | 90.90 | +0.76 | CIEN ahead |
| 2025-05-02 | 111.51 | 89.81 | +0.81 | CIEN ahead |
| 2025-05-01 | 109.34 | 86.73 | +0.88 | CIEN ahead |
| 2025-04-30 | 102.80 | 84.38 | +0.74 | CIEN ahead |
| 2025-04-29 | 103.11 | 85.40 | +0.70 | CIEN ahead |
| 2025-04-28 | 101.76 | 83.54 | +0.75 | CIEN ahead |
| 2025-04-25 | 100.93 | 82.52 | +0.77 | CIEN ahead |
| 2025-04-24 | 98.41 | 81.89 | +0.70 | CIEN ahead |
| 2025-04-23 | 95.81 | 76.87 | +0.86 | CIEN ahead |
| 2025-04-22 | 91.08 | 72.89 | +0.88 | CIEN ahead |
| 2025-04-21 | 88.54 | 70.98 | +0.87 | CIEN ahead |
| 2025-04-17 | 92.06 | 75.57 | +0.78 | CIEN ahead |
| 2025-04-16 | 90.11 | 76.82 | +0.62 | CIEN ahead |
| 2025-04-15 | 90.89 | 77.57 | +0.62 | CIEN ahead |
| 2025-04-14 | 89.55 | 78.26 | +0.51 | CIEN ahead |
| 2025-04-11 | 89.97 | 77.82 | +0.56 | CIEN ahead |
| 2025-04-10 | 89.33 | 75.22 | +0.68 | CIEN ahead |
| 2025-04-09 | 94.89 | 83.08 | +0.52 | CIEN ahead |
| 2025-04-08 | 82.70 | 71.61 | +0.57 | CIEN ahead |
| 2025-04-07 | 84.52 | 73.83 | +0.54 | CIEN ahead |
| 2025-04-04 | 81.89 | 70.38 | +0.61 | CIEN ahead |
| 2025-04-03 | 86.01 | 71.01 | +0.79 | CIEN ahead |
| 2025-04-02 | 99.54 | 83.07 | +0.75 | CIEN ahead |
| 2025-04-01 | 94.20 | 81.07 | +0.62 | CIEN ahead |
| 2025-03-31 | 92.50 | 81.27 | +0.53 | CIEN ahead |
| 2025-03-28 | 94.23 | 80.71 | +0.64 | CIEN ahead |
| 2025-03-27 | 96.22 | 85.01 | +0.51 | CIEN ahead |
| 2025-03-26 | 100.66 | 85.90 | +0.67 | CIEN ahead |
| 2025-03-25 | 106.26 | 91.61 | +0.63 | CIEN ahead |
| 2025-03-24 | 106.43 | 95.19 | +0.47 | near the usual relationship |
| 2025-03-21 | 100.35 | 90.82 | +0.42 | near the usual relationship |
| 2025-03-20 | 100.46 | 91.38 | +0.40 | near the usual relationship |
| 2025-03-19 | 100.87 | 92.39 | +0.37 | near the usual relationship |
| 2025-03-18 | 98.47 | 91.70 | +0.30 | near the usual relationship |
| 2025-03-17 | 100.54 | 91.11 | +0.42 | near the usual relationship |
| 2025-03-14 | 97.72 | 90.53 | +0.33 | near the usual relationship |
| 2025-03-13 | 95.38 | 92.03 | +0.15 | near the usual relationship |
| 2025-03-12 | 101.64 | 83.07 | +0.89 | CIEN ahead |
| 2025-03-11 | 97.89 | 81.39 | +0.82 | CIEN ahead |
| 2025-03-10 | 100.31 | 77.31 | +1.16 | CIEN ahead |
| 2025-03-07 | 105.51 | 79.76 | +1.25 | CIEN ahead |
| 2025-03-06 | 104.75 | 75.57 | +1.47 | CIEN ahead |
| 2025-03-05 | 115.18 | 81.41 | +1.57 | CIEN ahead |
| 2025-03-04 | 113.75 | 78.33 | +1.70 | CIEN ahead |
| 2025-03-03 | 114.33 | 78.34 | +1.74 | CIEN ahead |
| 2025-02-28 | 121.80 | 82.32 | +1.82 | CIEN ahead |
| 2025-02-27 | 119.44 | 80.33 | +1.86 | CIEN ahead |
| 2025-02-26 | 123.63 | 88.60 | +1.59 | CIEN ahead |
| 2025-02-25 | 119.84 | 84.04 | +1.70 | CIEN ahead |
| 2025-02-24 | 123.11 | 88.22 | +1.61 | CIEN ahead |
| 2025-02-21 | 128.70 | 91.31 | +1.67 | CIEN ahead |
| 2025-02-20 | 132.33 | 94.92 | +1.64 | CIEN ahead |
| 2025-02-19 | 133.25 | 98.35 | +1.51 | CIEN ahead |
| 2025-02-18 | 137.23 | 99.09 | +1.63 | CIEN ahead |
| 2025-02-14 | 137.46 | 91.78 | +2.02 | CIEN ahead |
| 2025-02-13 | 136.00 | 88.07 | +2.20 | CIEN ahead |
| 2025-02-12 | 135.93 | 86.93 | +2.29 | CIEN ahead |
| 2025-02-11 | 133.92 | 85.22 | +2.34 | CIEN ahead |
| 2025-02-10 | 137.93 | 86.78 | +2.43 | CIEN ahead |
| 2025-02-07 | 137.32 | 87.26 | +2.42 | CIEN ahead |
| 2025-02-06 | 142.54 | 90.87 | +2.44 | CIEN ahead |
| 2025-02-05 | 140.95 | 87.98 | +2.59 | CIEN ahead |
| 2025-02-04 | 133.94 | 85.23 | +2.53 | CIEN ahead |
| 2025-02-03 | 130.29 | 92.83 | +1.97 | CIEN ahead |
| 2025-01-31 | 133.38 | 88.97 | +2.35 | CIEN ahead |
| 2025-01-30 | 129.57 | 87.57 | +2.31 | CIEN ahead |
| 2025-01-29 | 124.54 | 85.48 | +2.26 | CIEN ahead |
| 2025-01-28 | 122.53 | 85.09 | +2.23 | CIEN ahead |
| 2025-01-27 | 116.78 | 83.13 | +2.12 | CIEN ahead |
| 2025-01-24 | 147.90 | 106.46 | +2.09 | CIEN ahead |
| 2025-01-23 | 150.28 | 109.42 | +2.05 | CIEN ahead |
| 2025-01-22 | 145.19 | 109.97 | +1.85 | CIEN ahead |
| 2025-01-21 | 135.74 | 103.74 | +1.82 | CIEN ahead |
| 2025-01-17 | 129.74 | 99.54 | +1.81 | CIEN ahead |
| 2025-01-16 | 128.64 | 96.74 | +1.95 | CIEN ahead |
| 2025-01-15 | 131.18 | 96.18 | +2.12 | CIEN ahead |
| 2025-01-14 | 127.78 | 93.58 | +2.15 | CIEN ahead |
| 2025-01-13 | 125.88 | 91.26 | +2.24 | CIEN ahead |
| 2025-01-10 | 125.90 | 93.96 | +2.10 | CIEN ahead |
| 2025-01-08 | 125.87 | 96.10 | +1.98 | CIEN ahead |
| 2025-01-07 | 125.41 | 94.30 | +2.10 | CIEN ahead |
| 2025-01-06 | 129.33 | 95.79 | +2.22 | CIEN ahead |
| 2025-01-03 | 127.98 | 94.51 | +2.27 | CIEN ahead |
| 2025-01-02 | 127.41 | 90.68 | +2.55 | CIEN ahead |
| 2024-12-31 | 129.82 | 90.48 | +2.73 | CIEN ahead |
| 2024-12-30 | 130.12 | 88.37 | +2.95 | CIEN ahead |
| 2024-12-27 | 132.65 | 90.31 | +3.00 | CIEN ahead |
| 2024-12-26 | 135.37 | 92.24 | +3.06 | CIEN ahead |
| 2024-12-24 | 134.59 | 91.04 | +3.19 | CIEN ahead |
| 2024-12-23 | 134.12 | 90.89 | +3.25 | CIEN ahead |
| 2024-12-20 | 133.75 | 91.05 | +3.30 | CIEN ahead |
| 2024-12-19 | 131.32 | 91.66 | +3.20 | CIEN ahead |
| 2024-12-18 | 128.46 | 95.31 | +2.81 | CIEN ahead |
| 2024-12-17 | 134.92 | 95.37 | +3.25 | CIEN ahead |
| 2024-12-16 | 139.51 | 97.78 | +3.40 | CIEN ahead |
| 2024-12-13 | 137.33 | 101.99 | +3.02 | CIEN ahead |
| 2024-12-12 | 129.37 | 101.15 | +2.67 | CIEN ahead |
| 2024-12-11 | 112.06 | 98.85 | +1.73 | CIEN ahead |
| 2024-12-10 | 108.50 | 96.22 | +1.70 | CIEN ahead |
| 2024-12-09 | 111.77 | 98.16 | +1.79 | CIEN ahead |
| 2024-12-06 | 112.63 | 99.99 | +1.71 | CIEN ahead |
| 2024-12-05 | 110.56 | 96.65 | +1.85 | CIEN ahead |
| 2024-12-04 | 111.97 | 99.49 | +1.72 | CIEN ahead |
| 2024-12-03 | 108.76 | 96.86 | +1.71 | CIEN ahead |
| 2024-12-02 | 106.41 | 96.28 | +1.59 | CIEN ahead |
| 2024-11-29 | 106.72 | 96.53 | +1.60 | CIEN ahead |
| 2024-11-27 | 105.88 | 92.93 | +1.85 | CIEN ahead |
| 2024-11-26 | 108.46 | 96.91 | +1.72 | CIEN ahead |
| 2024-11-25 | 107.42 | 94.08 | +1.89 | CIEN ahead |
| 2024-11-22 | 107.35 | 94.82 | +1.83 | CIEN ahead |
| 2024-11-21 | 104.35 | 94.65 | +1.62 | CIEN ahead |
| 2024-11-20 | 101.76 | 93.12 | +1.56 | CIEN ahead |
| 2024-11-19 | 102.71 | 102.35 | +0.85 | CIEN ahead |
| 2024-11-18 | 101.91 | 95.57 | +1.36 | CIEN ahead |
| 2024-11-15 | 102.89 | 96.64 | +1.35 | CIEN ahead |
| 2024-11-14 | 106.77 | 103.70 | +1.07 | CIEN ahead |
| 2024-11-13 | 109.29 | 103.70 | +1.28 | CIEN ahead |
| 2024-11-12 | 108.57 | 106.51 | +1.00 | CIEN ahead |
| 2024-11-11 | 110.29 | 111.48 | +0.75 | CIEN ahead |
| 2024-11-08 | 110.07 | 111.55 | +0.73 | CIEN ahead |
| 2024-11-07 | 107.64 | 107.97 | +0.82 | CIEN ahead |
| 2024-11-06 | 104.85 | 101.53 | +1.12 | CIEN ahead |
| 2024-11-05 | 100.81 | 94.74 | +1.38 | CIEN ahead |
| 2024-11-04 | 96.80 | 98.60 | +0.69 | CIEN ahead |
| 2024-11-01 | 97.92 | 99.80 | +0.68 | CIEN ahead |
| 2024-10-31 | 97.21 | 99.16 | +0.67 | CIEN ahead |
| 2024-10-30 | 98.93 | 103.02 | +0.50 | CIEN ahead |
| 2024-10-29 | 99.98 | 103.86 | +0.52 | CIEN ahead |
| 2024-10-28 | 98.10 | 101.08 | +0.58 | CIEN ahead |
| 2024-10-25 | 98.15 | 101.42 | +0.56 | CIEN ahead |
| 2024-10-24 | 101.12 | 101.03 | +0.85 | CIEN ahead |
| 2024-10-23 | 101.41 | 101.49 | +0.84 | CIEN ahead |
| 2024-10-22 | 101.26 | 102.19 | +0.77 | CIEN ahead |
| 2024-10-21 | 101.88 | 102.25 | +0.82 | CIEN ahead |
| 2024-10-18 | 100.00 | 100.00 | +0.85 | CIEN ahead |
One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Mar 13, 2025 (CIEN -6.2%, FN +10.8%); Jun 5, 2025 (CIEN -12.9%, FN -0.9%); Sep 4, 2025 (CIEN +23.3%, FN +7.3%); Feb 3, 2026 (CIEN +3.0%, FN -10.2%). Upcoming earnings: FN Nov 2, 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
CIEN and FN at a glance
CIEN Ciena Corporation
- Listing
- NYSE · SEC CIK 936395
- Industry
- Telecommunications Equipment · SIC 3661 Telephone & Telegraph Apparatus
- Market value
- $48.8B
- Price history
- 2,521 daily closes, Oct 12, 2016 to Oct 22, 2026
FN Fabrinet
- Listing
- NYSE · SEC CIK 1408710
- Industry
- Telecommunications Equipment · SIC 3661 Telephone & Telegraph Apparatus
- Market value
- $13.0B
- 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.
Follow the research behind the paper book
Boostio is a research-first platform in private beta: crypto candidates, daily market stories, public paper trading and now rival stocks. Exploring these pages stays free and open.
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.
