Cardinal Health Inc. vs McKesson Corporation
Measured twinCAH / MCKPrices through Oct 22, 2026
Why these are rivals: #1 and #3 by market value ($118B vs $59B) in Nasdaq's "Other Pharmaceuticals" industry; SEC SIC 5122 / 5122 (same major group); #1 and #3 by market value ($118B vs $59B) with SEC SIC 5122 (Wholesale-Drugs, Proprietaries & Druggists' Sundries).
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 = -0.04 (needs |z| >= 2.0)
Business leadership
MCK is the larger business
Annual revenue reported to the SEC. Scale, not market share.
| Year | CAH | MCK | Larger |
|---|---|---|---|
| 2025 | $222.6B | $403.4B | MCK |
| 2024 | $226.8B | $359.1B | MCK |
| 2023 | $205.0B | $309.0B | MCK |
| 2022 | $181.3B | $276.7B | MCK |
| 2021 | $162.5B | $264.0B | MCK |
| 2020 | $152.9B | $238.2B | MCK |
MCK led in every year with figures for both. Market value: CAH $58.5B, MCK $117.8B.
Stock leadership
Neither is clearly ahead
Measured against the pair's own last 252 trading days.
The gap is 0.04 standard deviations, close to the usual relationship. 1 lead switch in the last year.
| Price change | 3 mo | 6 mo | 12 mo |
|---|---|---|---|
| CAH | +12.1% | +24.9% | +61.1% |
| MCK | +20.4% | +21.1% | +28.6% |
Relationship
The gap has closed before
Only these tests can make a pair tradable on paper.
- Pass
- Aligned sessions: 2521 (needs >= 254)
- Pass
- Co-movement: daily return correlation, 252 sessions: 0.65 (needs >= 0.60)
- Pass
- Mean reversion: ADF t-statistic of the spread: -3.13 (needs <= -2.873 (5% critical value))
- Pass
- Speed: half-life of the spread, sessions: 18.46 (needs <= 63)
- Data
- Both stocks current
The twins over two years
Prices side by side, and the gap between them
CAH Cardinal Health Inc. MCK McKesson 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: CAH relative to MCK, against the 252 sessions before each day. Above 0: CAH ahead; below 0: MCK ahead. Lines at +/-2 (idea) and +/-4 (stop).
Data table (504 sessions)
| Date | CAH index | MCK index | z | Ahead |
|---|---|---|---|---|
| 2026-10-22 | 227.42 | 198.81 | -0.04 | near the usual relationship |
| 2026-10-21 | 229.04 | 199.43 | +0.02 | near the usual relationship |
| 2026-10-20 | 229.12 | 202.30 | -0.14 | near the usual relationship |
| 2026-10-19 | 224.76 | 198.43 | -0.12 | near the usual relationship |
| 2026-10-16 | 226.01 | 197.34 | +0.02 | near the usual relationship |
| 2026-10-15 | 225.70 | 196.12 | +0.09 | near the usual relationship |
| 2026-10-14 | 220.39 | 191.79 | +0.08 | near the usual relationship |
| 2026-10-13 | 213.26 | 188.90 | -0.11 | near the usual relationship |
| 2026-10-12 | 211.80 | 187.70 | -0.11 | near the usual relationship |
| 2026-10-09 | 211.34 | 184.38 | +0.08 | near the usual relationship |
| 2026-10-08 | 212.58 | 182.69 | +0.25 | near the usual relationship |
| 2026-10-07 | 206.53 | 178.78 | +0.18 | near the usual relationship |
| 2026-10-06 | 207.67 | 181.00 | +0.11 | near the usual relationship |
| 2026-10-05 | 207.38 | 179.78 | +0.18 | near the usual relationship |
| 2026-10-02 | 203.10 | 177.20 | +0.12 | near the usual relationship |
| 2026-10-01 | 204.69 | 176.52 | +0.25 | near the usual relationship |
| 2026-09-30 | 197.94 | 167.68 | +0.45 | near the usual relationship |
| 2026-09-29 | 199.19 | 169.84 | +0.38 | near the usual relationship |
| 2026-09-28 | 195.97 | 168.16 | +0.32 | near the usual relationship |
| 2026-09-25 | 195.91 | 170.20 | +0.20 | near the usual relationship |
| 2026-09-24 | 198.04 | 170.73 | +0.29 | near the usual relationship |
| 2026-09-23 | 196.84 | 172.92 | +0.10 | near the usual relationship |
| 2026-09-22 | 197.53 | 175.03 | +0.02 | near the usual relationship |
| 2026-09-21 | 200.83 | 174.09 | +0.25 | near the usual relationship |
| 2026-09-18 | 200.50 | 171.77 | +0.37 | near the usual relationship |
| 2026-09-17 | 201.35 | 172.74 | +0.37 | near the usual relationship |
| 2026-09-16 | 206.87 | 174.25 | +0.55 | CAH ahead |
| 2026-09-15 | 206.97 | 176.66 | +0.43 | near the usual relationship |
| 2026-09-14 | 208.96 | 178.90 | +0.40 | near the usual relationship |
| 2026-09-11 | 208.67 | 173.12 | +0.72 | CAH ahead |
| 2026-09-10 | 209.96 | 172.99 | +0.80 | CAH ahead |
| 2026-09-09 | 213.50 | 175.11 | +0.85 | CAH ahead |
| 2026-09-08 | 213.94 | 174.61 | +0.90 | CAH ahead |
| 2026-09-04 | 219.89 | 178.32 | +0.97 | CAH ahead |
| 2026-09-03 | 221.16 | 180.95 | +0.89 | CAH ahead |
| 2026-09-02 | 218.39 | 181.61 | +0.74 | CAH ahead |
| 2026-09-01 | 212.93 | 178.08 | +0.69 | CAH ahead |
| 2026-08-31 | 208.72 | 173.86 | +0.74 | CAH ahead |
| 2026-08-28 | 208.66 | 175.45 | +0.65 | CAH ahead |
| 2026-08-27 | 209.17 | 174.88 | +0.71 | CAH ahead |
| 2026-08-26 | 212.08 | 176.09 | +0.79 | CAH ahead |
| 2026-08-25 | 211.65 | 177.75 | +0.68 | CAH ahead |
| 2026-08-24 | 206.72 | 171.60 | +0.80 | CAH ahead |
| 2026-08-21 | 204.17 | 168.68 | +0.85 | CAH ahead |
| 2026-08-20 | 203.24 | 164.72 | +1.05 | CAH ahead |
| 2026-08-19 | 208.92 | 167.66 | +1.15 | CAH ahead |
| 2026-08-18 | 209.04 | 170.71 | +0.99 | CAH ahead |
| 2026-08-17 | 209.64 | 168.88 | +1.13 | CAH ahead |
| 2026-08-14 | 209.21 | 170.66 | +1.02 | CAH ahead |
| 2026-08-13 | 205.71 | 168.24 | +1.00 | CAH ahead |
| 2026-08-12 | 208.31 | 172.57 | +0.88 | CAH ahead |
| 2026-08-11 | 213.74 | 177.10 | +0.89 | CAH ahead |
| 2026-08-10 | 211.00 | 172.79 | +1.01 | CAH ahead |
| 2026-08-07 | 210.30 | 170.77 | +1.10 | CAH ahead |
| 2026-08-06 | 211.42 | 171.13 | +1.14 | CAH ahead |
| 2026-08-05 | 212.82 | 172.28 | +1.15 | CAH ahead |
| 2026-08-04 | 207.77 | 163.09 | +1.46 | CAH ahead |
| 2026-08-03 | 209.59 | 162.44 | +1.60 | CAH ahead |
| 2026-07-31 | 204.63 | 168.14 | +1.04 | CAH ahead |
| 2026-07-30 | 202.00 | 169.97 | +0.81 | CAH ahead |
| 2026-07-29 | 203.83 | 174.50 | +0.65 | CAH ahead |
| 2026-07-28 | 206.84 | 174.69 | +0.79 | CAH ahead |
| 2026-07-27 | 204.03 | 166.94 | +1.10 | CAH ahead |
| 2026-07-24 | 202.86 | 165.14 | +1.16 | CAH ahead |
| 2026-07-23 | 201.03 | 161.92 | +1.28 | CAH ahead |
| 2026-07-22 | 196.19 | 159.87 | +1.17 | CAH ahead |
| 2026-07-21 | 202.02 | 162.77 | +1.29 | CAH ahead |
| 2026-07-20 | 200.83 | 163.29 | +1.21 | CAH ahead |
| 2026-07-17 | 203.29 | 165.24 | +1.23 | CAH ahead |
| 2026-07-16 | 203.47 | 165.22 | +1.25 | CAH ahead |
| 2026-07-15 | 200.11 | 156.39 | +1.64 | CAH ahead |
| 2026-07-14 | 204.71 | 157.77 | +1.80 | CAH ahead |
| 2026-07-13 | 207.86 | 159.52 | +1.87 | CAH ahead |
| 2026-07-10 | 209.77 | 158.28 | +2.06 | CAH ahead |
| 2026-07-09 | 207.96 | 155.70 | +2.17 | CAH ahead |
| 2026-07-08 | 210.97 | 160.77 | +2.01 | CAH ahead |
| 2026-07-07 | 213.25 | 158.55 | +2.30 | CAH ahead |
| 2026-07-06 | 211.30 | 154.01 | +2.55 | CAH ahead |
| 2026-07-02 | 212.56 | 154.42 | +2.63 | CAH ahead |
| 2026-07-01 | 211.48 | 150.84 | +2.89 | CAH ahead |
| 2026-06-30 | 211.33 | 148.39 | +3.13 | CAH ahead |
| 2026-06-29 | 210.14 | 146.80 | +3.27 | CAH ahead |
| 2026-06-26 | 211.65 | 149.94 | +3.19 | CAH ahead |
| 2026-06-25 | 208.83 | 150.00 | +3.10 | CAH ahead |
| 2026-06-24 | 207.29 | 150.54 | +3.03 | CAH ahead |
| 2026-06-23 | 203.64 | 150.02 | +2.92 | CAH ahead |
| 2026-06-22 | 198.15 | 146.28 | +2.96 | CAH ahead |
| 2026-06-18 | 197.29 | 147.41 | +2.87 | CAH ahead |
| 2026-06-17 | 201.30 | 153.14 | +2.69 | CAH ahead |
| 2026-06-16 | 202.58 | 154.25 | +2.73 | CAH ahead |
| 2026-06-15 | 201.41 | 153.14 | +2.80 | CAH ahead |
| 2026-06-12 | 199.14 | 153.98 | +2.63 | CAH ahead |
| 2026-06-11 | 196.74 | 154.59 | +2.45 | CAH ahead |
| 2026-06-10 | 192.42 | 155.23 | +2.13 | CAH ahead |
| 2026-06-09 | 189.19 | 154.01 | +2.03 | CAH ahead |
| 2026-06-08 | 181.91 | 150.56 | +1.83 | CAH ahead |
| 2026-06-05 | 183.00 | 152.33 | +1.77 | CAH ahead |
| 2026-06-04 | 179.47 | 148.65 | +1.85 | CAH ahead |
| 2026-06-03 | 174.23 | 145.23 | +1.78 | CAH ahead |
| 2026-06-02 | 173.37 | 144.69 | +1.79 | CAH ahead |
| 2026-06-01 | 173.61 | 144.31 | +1.86 | CAH ahead |
| 2026-05-29 | 175.07 | 145.81 | +1.86 | CAH ahead |
| 2026-05-28 | 177.79 | 148.66 | +1.82 | CAH ahead |
| 2026-05-27 | 177.78 | 148.56 | +1.85 | CAH ahead |
| 2026-05-26 | 178.25 | 148.15 | +1.94 | CAH ahead |
| 2026-05-22 | 178.53 | 150.45 | +1.77 | CAH ahead |
| 2026-05-21 | 178.46 | 150.53 | +1.77 | CAH ahead |
| 2026-05-20 | 177.24 | 148.21 | +1.92 | CAH ahead |
| 2026-05-19 | 178.25 | 149.62 | +1.88 | CAH ahead |
| 2026-05-18 | 177.72 | 152.39 | +1.59 | CAH ahead |
| 2026-05-15 | 173.65 | 149.37 | +1.56 | CAH ahead |
| 2026-05-14 | 172.92 | 146.75 | +1.77 | CAH ahead |
| 2026-05-13 | 165.78 | 144.77 | +1.37 | CAH ahead |
| 2026-05-12 | 162.41 | 144.28 | +1.13 | CAH ahead |
| 2026-05-11 | 162.35 | 142.41 | +1.33 | CAH ahead |
| 2026-05-08 | 163.38 | 144.56 | +1.21 | CAH ahead |
| 2026-05-07 | 164.83 | 148.22 | +0.98 | CAH ahead |
| 2026-05-06 | 170.35 | 146.05 | +1.69 | CAH ahead |
| 2026-05-05 | 175.25 | 157.31 | +1.03 | CAH ahead |
| 2026-05-04 | 175.30 | 158.65 | +0.92 | CAH ahead |
| 2026-05-01 | 173.69 | 159.86 | +0.68 | CAH ahead |
| 2026-04-30 | 171.59 | 160.09 | +0.49 | near the usual relationship |
| 2026-04-29 | 180.43 | 161.55 | +1.08 | CAH ahead |
| 2026-04-28 | 182.91 | 163.98 | +1.07 | CAH ahead |
| 2026-04-27 | 180.00 | 162.67 | +0.96 | CAH ahead |
| 2026-04-24 | 177.79 | 162.63 | +0.80 | CAH ahead |
| 2026-04-23 | 182.12 | 164.20 | +1.00 | CAH ahead |
| 2026-04-22 | 178.41 | 162.85 | +0.84 | CAH ahead |
| 2026-04-21 | 182.30 | 165.41 | +0.92 | CAH ahead |
| 2026-04-20 | 187.87 | 168.70 | +1.07 | CAH ahead |
| 2026-04-17 | 190.37 | 170.15 | +1.14 | CAH ahead |
| 2026-04-16 | 189.57 | 170.33 | +1.07 | CAH ahead |
| 2026-04-15 | 188.44 | 169.56 | +1.06 | CAH ahead |
| 2026-04-14 | 191.22 | 169.44 | +1.27 | CAH ahead |
| 2026-04-13 | 190.53 | 169.79 | +1.20 | CAH ahead |
| 2026-04-10 | 191.73 | 169.99 | +1.27 | CAH ahead |
| 2026-04-09 | 191.98 | 171.53 | +1.18 | CAH ahead |
| 2026-04-08 | 191.38 | 171.09 | +1.18 | CAH ahead |
| 2026-04-07 | 189.28 | 168.23 | +1.26 | CAH ahead |
| 2026-04-06 | 189.15 | 168.26 | +1.25 | CAH ahead |
| 2026-04-02 | 190.42 | 173.66 | +0.95 | CAH ahead |
| 2026-04-01 | 188.61 | 171.31 | +1.01 | CAH ahead |
| 2026-03-31 | 187.98 | 169.95 | +1.07 | CAH ahead |
| 2026-03-30 | 183.53 | 168.93 | +0.85 | CAH ahead |
| 2026-03-27 | 183.77 | 168.92 | +0.88 | CAH ahead |
| 2026-03-26 | 184.77 | 169.59 | +0.90 | CAH ahead |
| 2026-03-25 | 187.98 | 172.77 | +0.89 | CAH ahead |
| 2026-03-24 | 184.35 | 173.20 | +0.62 | CAH ahead |
| 2026-03-23 | 183.61 | 172.23 | +0.65 | CAH ahead |
| 2026-03-20 | 184.89 | 173.97 | +0.62 | CAH ahead |
| 2026-03-19 | 187.63 | 176.54 | +0.62 | CAH ahead |
| 2026-03-18 | 188.48 | 180.74 | +0.39 | near the usual relationship |
| 2026-03-17 | 192.47 | 184.97 | +0.37 | near the usual relationship |
| 2026-03-16 | 193.57 | 185.24 | +0.43 | near the usual relationship |
| 2026-03-13 | 193.11 | 184.78 | +0.44 | near the usual relationship |
| 2026-03-12 | 194.90 | 185.46 | +0.51 | CAH ahead |
| 2026-03-11 | 191.64 | 183.48 | +0.44 | near the usual relationship |
| 2026-03-10 | 193.08 | 182.38 | +0.61 | CAH ahead |
| 2026-03-09 | 197.74 | 185.03 | +0.73 | CAH ahead |
| 2026-03-06 | 193.74 | 180.53 | +0.79 | CAH ahead |
| 2026-03-05 | 192.17 | 182.90 | +0.54 | CAH ahead |
| 2026-03-04 | 198.54 | 192.21 | +0.34 | near the usual relationship |
| 2026-03-03 | 201.36 | 195.54 | +0.31 | near the usual relationship |
| 2026-03-02 | 204.50 | 194.61 | +0.56 | CAH ahead |
| 2026-02-27 | 203.92 | 193.91 | +0.57 | CAH ahead |
| 2026-02-26 | 202.05 | 191.37 | +0.62 | CAH ahead |
| 2026-02-25 | 201.21 | 189.17 | +0.72 | CAH ahead |
| 2026-02-24 | 201.02 | 188.01 | +0.78 | CAH ahead |
| 2026-02-23 | 200.00 | 186.42 | +0.83 | CAH ahead |
| 2026-02-20 | 199.66 | 186.07 | +0.84 | CAH ahead |
| 2026-02-19 | 198.17 | 184.04 | +0.88 | CAH ahead |
| 2026-02-18 | 200.15 | 185.97 | +0.88 | CAH ahead |
| 2026-02-17 | 200.68 | 185.87 | +0.93 | CAH ahead |
| 2026-02-13 | 196.41 | 183.57 | +0.83 | CAH ahead |
| 2026-02-12 | 191.32 | 179.89 | +0.76 | CAH ahead |
| 2026-02-11 | 199.49 | 187.19 | +0.79 | CAH ahead |
| 2026-02-10 | 195.95 | 183.66 | +0.81 | CAH ahead |
| 2026-02-09 | 200.84 | 188.99 | +0.77 | CAH ahead |
| 2026-02-06 | 201.33 | 186.31 | +0.98 | CAH ahead |
| 2026-02-05 | 202.10 | 188.10 | +0.91 | CAH ahead |
| 2026-02-04 | 184.01 | 161.43 | +1.64 | CAH ahead |
| 2026-02-03 | 193.93 | 167.15 | +1.87 | CAH ahead |
| 2026-02-02 | 194.76 | 166.24 | +2.01 | CAH ahead |
| 2026-01-30 | 191.16 | 163.24 | +2.03 | CAH ahead |
| 2026-01-29 | 187.91 | 161.49 | +1.98 | CAH ahead |
| 2026-01-28 | 187.16 | 162.34 | +1.88 | CAH ahead |
| 2026-01-27 | 190.41 | 163.82 | +2.01 | CAH ahead |
| 2026-01-26 | 187.64 | 162.34 | +1.96 | CAH ahead |
| 2026-01-23 | 185.33 | 161.08 | +1.92 | CAH ahead |
| 2026-01-22 | 184.05 | 160.46 | +1.91 | CAH ahead |
| 2026-01-21 | 185.46 | 161.68 | +1.93 | CAH ahead |
| 2026-01-20 | 187.15 | 161.40 | +2.10 | CAH ahead |
| 2026-01-16 | 189.00 | 165.05 | +1.96 | CAH ahead |
| 2026-01-15 | 189.89 | 165.78 | +1.99 | CAH ahead |
| 2026-01-14 | 189.98 | 163.82 | +2.18 | CAH ahead |
| 2026-01-13 | 185.27 | 161.82 | +2.03 | CAH ahead |
| 2026-01-12 | 180.16 | 162.14 | +1.65 | CAH ahead |
| 2026-01-09 | 178.91 | 160.26 | +1.73 | CAH ahead |
| 2026-01-08 | 180.14 | 159.98 | +1.87 | CAH ahead |
| 2026-01-07 | 184.32 | 161.81 | +2.05 | CAH ahead |
| 2026-01-06 | 185.46 | 162.32 | +2.12 | CAH ahead |
| 2026-01-05 | 182.77 | 162.00 | +1.97 | CAH ahead |
| 2026-01-02 | 183.01 | 161.71 | +2.04 | CAH ahead |
| 2025-12-31 | 182.81 | 161.09 | +2.10 | CAH ahead |
| 2025-12-30 | 184.33 | 162.48 | +2.13 | CAH ahead |
| 2025-12-29 | 184.49 | 163.08 | +2.11 | CAH ahead |
| 2025-12-26 | 185.29 | 162.66 | +2.24 | CAH ahead |
| 2025-12-24 | 184.63 | 162.30 | +2.25 | CAH ahead |
| 2025-12-23 | 184.48 | 162.16 | +2.29 | CAH ahead |
| 2025-12-22 | 182.55 | 160.72 | +2.30 | CAH ahead |
| 2025-12-19 | 180.54 | 161.09 | +2.13 | CAH ahead |
| 2025-12-18 | 177.12 | 159.18 | +2.04 | CAH ahead |
| 2025-12-17 | 176.53 | 158.39 | +2.10 | CAH ahead |
| 2025-12-16 | 176.04 | 159.07 | +2.01 | CAH ahead |
| 2025-12-15 | 177.88 | 161.63 | +1.95 | CAH ahead |
| 2025-12-12 | 176.30 | 159.82 | +2.01 | CAH ahead |
| 2025-12-11 | 176.43 | 160.16 | +2.01 | CAH ahead |
| 2025-12-10 | 176.33 | 159.68 | +2.08 | CAH ahead |
| 2025-12-09 | 176.14 | 156.13 | +2.45 | CAH ahead |
| 2025-12-08 | 176.92 | 156.70 | +2.51 | CAH ahead |
| 2025-12-05 | 176.88 | 158.80 | +2.32 | CAH ahead |
| 2025-12-04 | 177.20 | 159.89 | +2.27 | CAH ahead |
| 2025-12-03 | 177.66 | 158.16 | +2.53 | CAH ahead |
| 2025-12-02 | 182.48 | 162.94 | +2.51 | CAH ahead |
| 2025-12-01 | 185.04 | 168.28 | +2.24 | CAH ahead |
| 2025-11-28 | 188.83 | 173.04 | +2.14 | CAH ahead |
| 2025-11-26 | 189.61 | 173.55 | +2.18 | CAH ahead |
| 2025-11-25 | 190.13 | 174.64 | +2.15 | CAH ahead |
| 2025-11-24 | 187.88 | 170.90 | +2.34 | CAH ahead |
| 2025-11-21 | 186.35 | 170.08 | +2.31 | CAH ahead |
| 2025-11-20 | 184.95 | 166.82 | +2.55 | CAH ahead |
| 2025-11-19 | 184.61 | 167.41 | +2.50 | CAH ahead |
| 2025-11-18 | 184.12 | 169.04 | +2.31 | CAH ahead |
| 2025-11-17 | 183.42 | 167.96 | +2.40 | CAH ahead |
| 2025-11-14 | 182.70 | 165.38 | +2.65 | CAH ahead |
| 2025-11-13 | 183.31 | 166.19 | +2.66 | CAH ahead |
| 2025-11-12 | 181.76 | 165.11 | +2.67 | CAH ahead |
| 2025-11-11 | 182.20 | 168.19 | +2.41 | CAH ahead |
| 2025-11-10 | 182.75 | 168.77 | +2.44 | CAH ahead |
| 2025-11-07 | 181.18 | 167.32 | +2.48 | CAH ahead |
| 2025-11-06 | 176.13 | 168.62 | +1.81 | CAH ahead |
| 2025-11-05 | 175.06 | 165.80 | +2.03 | CAH ahead |
| 2025-11-04 | 173.77 | 165.29 | +1.97 | CAH ahead |
| 2025-11-03 | 169.22 | 161.09 | +1.97 | CAH ahead |
| 2025-10-31 | 169.71 | 159.34 | +2.26 | CAH ahead |
| 2025-10-30 | 168.88 | 162.12 | +1.84 | CAH ahead |
| 2025-10-29 | 146.31 | 158.61 | -0.57 | MCK ahead |
| 2025-10-28 | 144.82 | 158.01 | -0.71 | MCK ahead |
| 2025-10-27 | 145.72 | 159.36 | -0.76 | MCK ahead |
| 2025-10-24 | 144.02 | 157.44 | -0.76 | MCK ahead |
| 2025-10-23 | 141.59 | 155.73 | -0.89 | MCK ahead |
| 2025-10-22 | 141.91 | 156.25 | -0.92 | MCK ahead |
| 2025-10-21 | 141.16 | 154.61 | -0.82 | MCK ahead |
| 2025-10-20 | 139.91 | 154.72 | -1.02 | MCK ahead |
| 2025-10-17 | 139.14 | 154.36 | -1.09 | MCK ahead |
| 2025-10-16 | 136.35 | 152.29 | -1.23 | MCK ahead |
| 2025-10-15 | 138.48 | 155.52 | -1.35 | MCK ahead |
| 2025-10-14 | 137.17 | 153.55 | -1.30 | MCK ahead |
| 2025-10-13 | 137.27 | 151.12 | -0.97 | MCK ahead |
| 2025-10-10 | 139.56 | 149.95 | -0.50 | MCK ahead |
| 2025-10-09 | 139.85 | 148.85 | -0.32 | near the usual relationship |
| 2025-10-08 | 140.35 | 148.42 | -0.20 | near the usual relationship |
| 2025-10-07 | 139.36 | 147.32 | -0.20 | near the usual relationship |
| 2025-10-06 | 138.06 | 145.58 | -0.16 | near the usual relationship |
| 2025-10-03 | 137.41 | 144.95 | -0.17 | near the usual relationship |
| 2025-10-02 | 140.97 | 149.00 | -0.21 | near the usual relationship |
| 2025-10-01 | 140.49 | 150.25 | -0.44 | near the usual relationship |
| 2025-09-30 | 139.63 | 151.72 | -0.75 | MCK ahead |
| 2025-09-29 | 137.51 | 149.61 | -0.78 | MCK ahead |
| 2025-09-26 | 136.74 | 149.36 | -0.87 | MCK ahead |
| 2025-09-25 | 132.51 | 144.64 | -0.86 | MCK ahead |
| 2025-09-24 | 137.51 | 149.37 | -0.77 | MCK ahead |
| 2025-09-23 | 137.55 | 145.58 | -0.28 | near the usual relationship |
| 2025-09-22 | 131.19 | 136.88 | -0.02 | near the usual relationship |
| 2025-09-19 | 133.08 | 137.14 | +0.22 | near the usual relationship |
| 2025-09-18 | 133.48 | 135.53 | +0.50 | CAH ahead |
| 2025-09-17 | 132.27 | 135.95 | +0.27 | near the usual relationship |
| 2025-09-16 | 131.99 | 136.18 | +0.19 | near the usual relationship |
| 2025-09-15 | 133.68 | 138.04 | +0.17 | near the usual relationship |
| 2025-09-12 | 135.43 | 139.71 | +0.19 | near the usual relationship |
| 2025-09-11 | 135.64 | 141.36 | -0.01 | near the usual relationship |
| 2025-09-10 | 132.81 | 138.70 | -0.05 | near the usual relationship |
| 2025-09-09 | 134.28 | 138.56 | +0.17 | near the usual relationship |
| 2025-09-08 | 133.69 | 136.88 | +0.32 | near the usual relationship |
| 2025-09-05 | 133.05 | 135.00 | +0.50 | CAH ahead |
| 2025-09-04 | 132.85 | 135.79 | +0.37 | near the usual relationship |
| 2025-09-03 | 133.94 | 135.67 | +0.54 | CAH ahead |
| 2025-09-02 | 133.04 | 135.82 | +0.40 | near the usual relationship |
| 2025-08-29 | 132.35 | 134.85 | +0.44 | near the usual relationship |
| 2025-08-28 | 133.00 | 133.74 | +0.69 | CAH ahead |
| 2025-08-27 | 132.76 | 134.23 | +0.60 | CAH ahead |
| 2025-08-26 | 131.21 | 133.64 | +0.46 | near the usual relationship |
| 2025-08-25 | 129.92 | 133.33 | +0.33 | near the usual relationship |
| 2025-08-22 | 131.75 | 135.40 | +0.31 | near the usual relationship |
| 2025-08-21 | 134.84 | 138.65 | +0.31 | near the usual relationship |
| 2025-08-20 | 136.06 | 138.05 | +0.56 | CAH ahead |
| 2025-08-19 | 132.57 | 132.94 | +0.78 | CAH ahead |
| 2025-08-18 | 133.20 | 131.81 | +1.03 | CAH ahead |
| 2025-08-15 | 133.09 | 132.18 | +0.97 | CAH ahead |
| 2025-08-14 | 133.64 | 132.33 | +1.02 | CAH ahead |
| 2025-08-13 | 131.77 | 130.24 | +1.06 | CAH ahead |
| 2025-08-12 | 130.15 | 129.42 | +0.95 | CAH ahead |
| 2025-08-11 | 140.25 | 132.12 | +1.86 | CAH ahead |
| 2025-08-08 | 140.03 | 131.30 | +1.91 | CAH ahead |
| 2025-08-07 | 136.47 | 130.25 | +1.59 | CAH ahead |
| 2025-08-06 | 139.31 | 138.21 | +0.96 | CAH ahead |
| 2025-08-05 | 140.77 | 139.33 | +0.99 | CAH ahead |
| 2025-08-04 | 141.11 | 139.62 | +0.99 | CAH ahead |
| 2025-08-01 | 138.78 | 137.23 | +1.00 | CAH ahead |
| 2025-07-31 | 138.08 | 136.20 | +1.03 | CAH ahead |
| 2025-07-30 | 140.47 | 140.40 | +0.84 | CAH ahead |
| 2025-07-29 | 140.01 | 139.86 | +0.85 | CAH ahead |
| 2025-07-28 | 139.07 | 138.70 | +0.87 | CAH ahead |
| 2025-07-25 | 139.79 | 139.79 | +0.84 | CAH ahead |
| 2025-07-24 | 140.81 | 139.47 | +0.96 | CAH ahead |
| 2025-07-23 | 140.34 | 140.22 | +0.85 | CAH ahead |
| 2025-07-22 | 139.76 | 139.33 | +0.88 | CAH ahead |
| 2025-07-21 | 141.07 | 139.67 | +0.97 | CAH ahead |
| 2025-07-18 | 141.94 | 139.40 | +1.07 | CAH ahead |
| 2025-07-17 | 141.86 | 139.49 | +1.06 | CAH ahead |
| 2025-07-16 | 143.32 | 140.56 | +1.09 | CAH ahead |
| 2025-07-15 | 143.24 | 139.60 | +1.17 | CAH ahead |
| 2025-07-14 | 143.84 | 140.53 | +1.14 | CAH ahead |
| 2025-07-11 | 143.20 | 139.35 | +1.19 | CAH ahead |
| 2025-07-10 | 144.27 | 140.33 | +1.19 | CAH ahead |
| 2025-07-09 | 146.13 | 142.82 | +1.14 | CAH ahead |
| 2025-07-08 | 146.29 | 142.21 | +1.21 | CAH ahead |
| 2025-07-07 | 149.12 | 144.41 | +1.26 | CAH ahead |
| 2025-07-03 | 146.72 | 141.26 | +1.32 | CAH ahead |
| 2025-07-02 | 144.10 | 138.54 | +1.35 | CAH ahead |
| 2025-07-01 | 146.25 | 142.92 | +1.18 | CAH ahead |
| 2025-06-30 | 149.45 | 143.91 | +1.34 | CAH ahead |
| 2025-06-27 | 148.72 | 142.53 | +1.40 | CAH ahead |
| 2025-06-26 | 147.33 | 141.79 | +1.37 | CAH ahead |
| 2025-06-25 | 145.67 | 141.09 | +1.31 | CAH ahead |
| 2025-06-24 | 146.08 | 141.56 | +1.31 | CAH ahead |
| 2025-06-23 | 145.89 | 141.76 | +1.29 | CAH ahead |
| 2025-06-20 | 145.36 | 141.58 | +1.27 | CAH ahead |
| 2025-06-18 | 147.14 | 143.15 | +1.30 | CAH ahead |
| 2025-06-17 | 146.70 | 142.26 | +1.34 | CAH ahead |
| 2025-06-16 | 144.48 | 141.31 | +1.26 | CAH ahead |
| 2025-06-13 | 143.59 | 143.01 | +1.07 | CAH ahead |
| 2025-06-12 | 142.80 | 143.52 | +0.98 | CAH ahead |
| 2025-06-11 | 136.58 | 140.96 | +0.71 | CAH ahead |
| 2025-06-10 | 136.18 | 138.42 | +0.88 | CAH ahead |
| 2025-06-09 | 136.66 | 139.08 | +0.87 | CAH ahead |
| 2025-06-06 | 137.63 | 140.00 | +0.88 | CAH ahead |
| 2025-06-05 | 137.11 | 139.75 | +0.87 | CAH ahead |
| 2025-06-04 | 137.06 | 139.33 | +0.90 | CAH ahead |
| 2025-06-03 | 138.32 | 140.39 | +0.93 | CAH ahead |
| 2025-06-02 | 138.11 | 141.74 | +0.82 | CAH ahead |
| 2025-05-30 | 137.39 | 141.30 | +0.80 | CAH ahead |
| 2025-05-29 | 136.99 | 140.00 | +0.88 | CAH ahead |
| 2025-05-28 | 136.22 | 139.85 | +0.84 | CAH ahead |
| 2025-05-27 | 137.60 | 141.47 | +0.83 | CAH ahead |
| 2025-05-23 | 135.89 | 140.63 | +0.77 | CAH ahead |
| 2025-05-22 | 135.66 | 139.56 | +0.84 | CAH ahead |
| 2025-05-21 | 136.38 | 141.15 | +0.78 | CAH ahead |
| 2025-05-20 | 137.68 | 141.24 | +0.88 | CAH ahead |
| 2025-05-19 | 136.87 | 142.66 | +0.73 | CAH ahead |
| 2025-05-16 | 137.22 | 142.22 | +0.79 | CAH ahead |
| 2025-05-15 | 135.17 | 138.80 | +0.89 | CAH ahead |
| 2025-05-14 | 132.03 | 133.99 | +1.01 | CAH ahead |
| 2025-05-13 | 131.89 | 135.07 | +0.93 | CAH ahead |
| 2025-05-12 | 132.21 | 135.02 | +0.97 | CAH ahead |
| 2025-05-09 | 131.86 | 136.19 | +0.86 | CAH ahead |
| 2025-05-08 | 131.01 | 135.56 | +0.85 | CAH ahead |
| 2025-05-07 | 136.54 | 141.86 | +0.81 | CAH ahead |
| 2025-05-06 | 134.94 | 139.64 | +0.86 | CAH ahead |
| 2025-05-05 | 135.21 | 138.85 | +0.94 | CAH ahead |
| 2025-05-02 | 133.02 | 139.12 | +0.76 | CAH ahead |
| 2025-05-01 | 129.46 | 138.80 | +0.52 | CAH ahead |
| 2025-04-30 | 125.69 | 139.98 | +0.14 | near the usual relationship |
| 2025-04-29 | 124.40 | 138.90 | +0.11 | near the usual relationship |
| 2025-04-28 | 122.98 | 137.42 | +0.11 | near the usual relationship |
| 2025-04-25 | 122.37 | 136.49 | +0.12 | near the usual relationship |
| 2025-04-24 | 120.84 | 135.20 | +0.09 | near the usual relationship |
| 2025-04-23 | 119.59 | 135.95 | -0.07 | near the usual relationship |
| 2025-04-22 | 118.93 | 136.52 | -0.17 | near the usual relationship |
| 2025-04-21 | 116.69 | 134.03 | -0.18 | near the usual relationship |
| 2025-04-17 | 119.84 | 136.90 | -0.12 | near the usual relationship |
| 2025-04-16 | 119.53 | 136.43 | -0.12 | near the usual relationship |
| 2025-04-15 | 119.43 | 136.07 | -0.10 | near the usual relationship |
| 2025-04-14 | 119.90 | 136.29 | -0.08 | near the usual relationship |
| 2025-04-11 | 117.22 | 135.38 | -0.24 | near the usual relationship |
| 2025-04-10 | 114.65 | 133.41 | -0.32 | near the usual relationship |
| 2025-04-09 | 116.05 | 131.92 | -0.09 | near the usual relationship |
| 2025-04-08 | 111.20 | 128.21 | -0.23 | near the usual relationship |
| 2025-04-07 | 111.80 | 130.00 | -0.32 | near the usual relationship |
| 2025-04-04 | 115.32 | 134.15 | -0.33 | near the usual relationship |
| 2025-04-03 | 121.96 | 140.80 | -0.25 | near the usual relationship |
| 2025-04-02 | 123.36 | 136.20 | +0.19 | near the usual relationship |
| 2025-04-01 | 121.99 | 132.30 | +0.37 | near the usual relationship |
| 2025-03-31 | 122.56 | 132.17 | +0.42 | near the usual relationship |
| 2025-03-28 | 121.38 | 131.20 | +0.40 | near the usual relationship |
| 2025-03-27 | 121.56 | 130.73 | +0.45 | near the usual relationship |
| 2025-03-26 | 119.19 | 130.21 | +0.29 | near the usual relationship |
| 2025-03-25 | 118.09 | 130.32 | +0.19 | near the usual relationship |
| 2025-03-24 | 118.50 | 129.78 | +0.26 | near the usual relationship |
| 2025-03-21 | 117.33 | 129.84 | +0.15 | near the usual relationship |
| 2025-03-20 | 118.39 | 130.86 | +0.16 | near the usual relationship |
| 2025-03-19 | 117.53 | 130.36 | +0.13 | near the usual relationship |
| 2025-03-18 | 116.95 | 129.93 | +0.11 | near the usual relationship |
| 2025-03-17 | 115.67 | 128.68 | +0.10 | near the usual relationship |
| 2025-03-14 | 113.87 | 127.74 | +0.01 | near the usual relationship |
| 2025-03-13 | 112.33 | 126.41 | -0.03 | near the usual relationship |
| 2025-03-12 | 112.83 | 125.82 | +0.06 | near the usual relationship |
| 2025-03-11 | 110.46 | 128.28 | -0.34 | near the usual relationship |
| 2025-03-10 | 110.25 | 129.39 | -0.45 | near the usual relationship |
| 2025-03-07 | 112.53 | 126.52 | -0.03 | near the usual relationship |
| 2025-03-06 | 112.99 | 126.02 | +0.04 | near the usual relationship |
| 2025-03-05 | 113.35 | 125.61 | +0.10 | near the usual relationship |
| 2025-03-04 | 112.37 | 126.41 | -0.05 | near the usual relationship |
| 2025-03-03 | 114.92 | 126.58 | +0.15 | near the usual relationship |
| 2025-02-28 | 115.19 | 125.74 | +0.24 | near the usual relationship |
| 2025-02-27 | 113.40 | 121.93 | +0.39 | near the usual relationship |
| 2025-02-26 | 113.14 | 122.47 | +0.32 | near the usual relationship |
| 2025-02-25 | 113.70 | 123.15 | +0.31 | near the usual relationship |
| 2025-02-24 | 113.47 | 118.96 | +0.63 | CAH ahead |
| 2025-02-21 | 113.03 | 117.38 | +0.72 | CAH ahead |
| 2025-02-20 | 113.32 | 118.52 | +0.66 | CAH ahead |
| 2025-02-19 | 112.76 | 118.37 | +0.62 | CAH ahead |
| 2025-02-18 | 112.31 | 117.72 | +0.64 | CAH ahead |
| 2025-02-14 | 112.28 | 116.59 | +0.73 | CAH ahead |
| 2025-02-13 | 112.78 | 118.32 | +0.63 | CAH ahead |
| 2025-02-12 | 113.03 | 116.85 | +0.77 | CAH ahead |
| 2025-02-11 | 114.22 | 119.88 | +0.63 | CAH ahead |
| 2025-02-10 | 113.16 | 118.50 | +0.65 | CAH ahead |
| 2025-02-07 | 113.31 | 116.99 | +0.79 | CAH ahead |
| 2025-02-06 | 113.02 | 117.78 | +0.70 | CAH ahead |
| 2025-02-05 | 113.38 | 119.19 | +0.62 | CAH ahead |
| 2025-02-04 | 111.35 | 118.48 | +0.50 | CAH ahead |
| 2025-02-03 | 111.49 | 117.80 | +0.57 | CAH ahead |
| 2025-01-31 | 110.01 | 116.80 | +0.52 | CAH ahead |
| 2025-01-30 | 114.10 | 118.74 | +0.71 | CAH ahead |
| 2025-01-29 | 113.66 | 118.46 | +0.69 | CAH ahead |
| 2025-01-28 | 113.63 | 118.41 | +0.69 | CAH ahead |
| 2025-01-27 | 116.30 | 118.70 | +0.90 | CAH ahead |
| 2025-01-24 | 114.61 | 116.18 | +0.96 | CAH ahead |
| 2025-01-23 | 115.03 | 117.28 | +0.91 | CAH ahead |
| 2025-01-22 | 114.54 | 114.76 | +1.08 | CAH ahead |
| 2025-01-21 | 113.72 | 115.10 | +0.98 | CAH ahead |
| 2025-01-17 | 112.33 | 116.37 | +0.75 | CAH ahead |
| 2025-01-16 | 113.01 | 116.89 | +0.77 | CAH ahead |
| 2025-01-15 | 110.94 | 114.58 | +0.78 | CAH ahead |
| 2025-01-14 | 110.34 | 116.60 | +0.55 | CAH ahead |
| 2025-01-13 | 107.52 | 114.90 | +0.44 | near the usual relationship |
| 2025-01-10 | 108.15 | 114.25 | +0.55 | CAH ahead |
| 2025-01-08 | 109.00 | 115.92 | +0.49 | near the usual relationship |
| 2025-01-07 | 108.00 | 114.93 | +0.48 | near the usual relationship |
| 2025-01-06 | 106.42 | 113.99 | +0.41 | near the usual relationship |
| 2025-01-03 | 106.13 | 113.40 | +0.43 | near the usual relationship |
| 2025-01-02 | 104.99 | 111.20 | +0.51 | CAH ahead |
| 2024-12-31 | 105.21 | 111.92 | +0.47 | near the usual relationship |
| 2024-12-30 | 104.90 | 112.09 | +0.42 | near the usual relationship |
| 2024-12-27 | 105.99 | 113.24 | +0.42 | near the usual relationship |
| 2024-12-26 | 106.04 | 113.60 | +0.39 | near the usual relationship |
| 2024-12-24 | 105.71 | 113.73 | +0.35 | near the usual relationship |
| 2024-12-23 | 105.28 | 113.27 | +0.34 | near the usual relationship |
| 2024-12-20 | 105.22 | 113.85 | +0.28 | near the usual relationship |
| 2024-12-19 | 104.08 | 113.75 | +0.18 | near the usual relationship |
| 2024-12-18 | 103.11 | 112.13 | +0.23 | near the usual relationship |
| 2024-12-17 | 103.03 | 110.52 | +0.35 | near the usual relationship |
| 2024-12-16 | 103.68 | 111.95 | +0.28 | near the usual relationship |
| 2024-12-13 | 105.06 | 113.17 | +0.30 | near the usual relationship |
| 2024-12-12 | 104.49 | 113.76 | +0.19 | near the usual relationship |
| 2024-12-11 | 104.46 | 113.25 | +0.23 | near the usual relationship |
| 2024-12-10 | 107.13 | 114.68 | +0.34 | near the usual relationship |
| 2024-12-09 | 108.16 | 116.24 | +0.30 | near the usual relationship |
| 2024-12-06 | 109.21 | 118.53 | +0.20 | near the usual relationship |
| 2024-12-05 | 109.28 | 119.31 | +0.14 | near the usual relationship |
| 2024-12-04 | 111.41 | 120.19 | +0.24 | near the usual relationship |
| 2024-12-03 | 109.66 | 121.36 | +0.01 | near the usual relationship |
| 2024-12-02 | 108.95 | 122.01 | -0.10 | near the usual relationship |
| 2024-11-29 | 108.74 | 123.43 | -0.23 | near the usual relationship |
| 2024-11-27 | 109.09 | 123.01 | -0.18 | near the usual relationship |
| 2024-11-26 | 108.92 | 122.74 | -0.18 | near the usual relationship |
| 2024-11-25 | 108.33 | 121.12 | -0.11 | near the usual relationship |
| 2024-11-22 | 108.39 | 122.39 | -0.20 | near the usual relationship |
| 2024-11-21 | 109.79 | 123.38 | -0.17 | near the usual relationship |
| 2024-11-20 | 107.05 | 121.98 | -0.30 | near the usual relationship |
| 2024-11-19 | 105.27 | 120.91 | -0.37 | near the usual relationship |
| 2024-11-18 | 106.78 | 120.90 | -0.25 | near the usual relationship |
| 2024-11-15 | 105.67 | 119.07 | -0.21 | near the usual relationship |
| 2024-11-14 | 107.90 | 119.83 | -0.09 | near the usual relationship |
| 2024-11-13 | 111.49 | 122.66 | -0.01 | near the usual relationship |
| 2024-11-12 | 109.87 | 121.30 | -0.05 | near the usual relationship |
| 2024-11-11 | 108.21 | 120.89 | -0.15 | near the usual relationship |
| 2024-11-08 | 107.25 | 120.38 | -0.20 | near the usual relationship |
| 2024-11-07 | 105.17 | 119.31 | -0.29 | near the usual relationship |
| 2024-11-06 | 102.82 | 107.88 | +0.38 | near the usual relationship |
| 2024-11-05 | 100.68 | 103.16 | +0.58 | CAH ahead |
| 2024-11-04 | 99.55 | 103.29 | +0.47 | near the usual relationship |
| 2024-11-01 | 103.31 | 103.37 | +0.79 | CAH ahead |
| 2024-10-31 | 96.54 | 98.31 | +0.64 | CAH ahead |
| 2024-10-30 | 95.98 | 98.06 | +0.62 | CAH ahead |
| 2024-10-29 | 97.91 | 98.03 | +0.80 | CAH ahead |
| 2024-10-28 | 98.63 | 99.95 | +0.69 | CAH ahead |
| 2024-10-25 | 98.65 | 99.65 | +0.72 | CAH ahead |
| 2024-10-24 | 99.78 | 99.17 | +0.87 | CAH ahead |
| 2024-10-23 | 99.56 | 98.54 | +0.91 | CAH ahead |
| 2024-10-22 | 99.84 | 99.25 | +0.88 | CAH ahead |
| 2024-10-21 | 99.92 | 99.83 | +0.84 | CAH ahead |
| 2024-10-18 | 100.00 | 100.00 | +0.83 | CAH ahead |
One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Nov 7, 2024 (CAH +2.3%, MCK +10.6%); Oct 30, 2025 (CAH +15.4%, MCK +2.2%); Feb 5, 2026 (CAH +9.8%, MCK +16.5%). Upcoming earnings: MCK Nov 4, 2026 (after-hours); CAH Nov 5, 2026 (pre-market).
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)
1 simulated trade to Oct 20, 2026: -6.51% per trade on average after costs, 0 won.
| Legs | Entered | Exited | Why | Days | Before costs | Costs + borrow | After costs |
|---|---|---|---|---|---|---|---|
| Long CAH · Short MCK | Sep 3, 2020 | Nov 5, 2020 | divergence stop | 63 | -$624.79 | -$73.27 | -$651.11 (-6.51%) |
Per $10,000 a leg. A replay on today's companies cannot prove an edge.
The companies
CAH and MCK at a glance
CAH Cardinal Health Inc.
- Listing
- NYSE · SEC CIK 721371
- Industry
- Other Pharmaceuticals · SIC 5122 Wholesale-Drugs, Proprietaries & Druggists' Sundries
- Market value
- $58.5B
- Price history
- 2,521 daily closes, Oct 12, 2016 to Oct 22, 2026
MCK McKesson Corporation
- Listing
- NYSE · SEC CIK 927653
- Industry
- Other Pharmaceuticals · SIC 5122 Wholesale-Drugs, Proprietaries & Druggists' Sundries
- Market value
- $117.8B
- 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 CAH and MCK
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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.
