Amgen Inc. vs Gilead Sciences Inc.
WatchlistAMGN / GILDPrices through Oct 22, 2026
Why these are rivals: #1 and #2 by market value ($230B vs $190B) in Nasdaq's "Biotechnology: Biological Products (No Diagnostic Substances)" industry; SEC SIC 2836 / 2836 (same major group); #1 and #2 by market value ($230B vs $190B) with SEC SIC 2836 (Biological Products, (No Diagnostic Substances)).
Rivals, but right now the price gap does not have a measured habit of closing, so there is no paper idea, whatever the gap.
- Co-movement: daily return correlation, 252 sessions: 0.52 (needs >= 0.60)
- Mean reversion: ADF t-statistic of the spread: -2.23 (needs <= -2.873 (5% critical value))
Business leadership
AMGN is the larger business
Annual revenue reported to the SEC. Scale, not market share.
| Year | AMGN | GILD | Larger |
|---|---|---|---|
| 2025 | $36.8B | $29.4B | AMGN |
| 2024 | $33.4B | $28.8B | AMGN |
| 2023 | $28.2B | $27.1B | AMGN |
| 2022 | $26.3B | $27.3B | GILD |
| 2021 | $26.0B | $27.3B | GILD |
| 2020 | $25.4B | $24.7B | AMGN |
Revenue lead switched: 2021 to GILD, 2023 to AMGN. Market value: AMGN $229.7B, GILD $189.8B.
Stock leadership
AMGN is ahead now
Measured against the pair's own last 252 trading days.
AMGN leads GILD by 1.07 standard deviations: +6.9% over its usual price ratio. 9 lead switches in the last year.
| Price change | 3 mo | 6 mo | 12 mo |
|---|---|---|---|
| AMGN | +18.9% | +28.3% | +48.5% |
| GILD | +21.6% | +17.6% | +26.7% |
Relationship
Not a measured twin today
Only these tests can make a pair tradable on paper.
- Pass
- Aligned sessions: 2521 (needs >= 254)
- Fail
- Co-movement: daily return correlation, 252 sessions: 0.52 (needs >= 0.60)
- Fail
- Mean reversion: ADF t-statistic of the spread: -2.23 (needs <= -2.873 (5% critical value))
- Pass
- Speed: half-life of the spread, sessions: 16.32 (needs <= 63)
- Data
- Both stocks current
The twins over two years
Prices side by side, and the gap between them
AMGN Amgen Inc. GILD Gilead Sciences Inc.Price 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: AMGN relative to GILD, against the 252 sessions before each day. Above 0: AMGN ahead; below 0: GILD ahead. Lines at +/-2 (idea) and +/-4 (stop).
Data table (504 sessions)
| Date | AMGN index | GILD index | z | Ahead |
|---|---|---|---|---|
| 2026-10-22 | 139.05 | 181.26 | +1.07 | AMGN ahead |
| 2026-10-21 | 136.27 | 177.09 | +1.13 | AMGN ahead |
| 2026-10-20 | 136.46 | 180.48 | +0.86 | AMGN ahead |
| 2026-10-19 | 132.11 | 176.51 | +0.70 | AMGN ahead |
| 2026-10-16 | 134.46 | 180.11 | +0.66 | AMGN ahead |
| 2026-10-15 | 134.93 | 181.47 | +0.60 | AMGN ahead |
| 2026-10-14 | 132.47 | 177.05 | +0.71 | AMGN ahead |
| 2026-10-13 | 128.35 | 170.57 | +0.81 | AMGN ahead |
| 2026-10-12 | 129.82 | 173.47 | +0.73 | AMGN ahead |
| 2026-10-09 | 128.98 | 174.32 | +0.55 | AMGN ahead |
| 2026-10-08 | 126.67 | 169.63 | +0.70 | AMGN ahead |
| 2026-10-07 | 128.42 | 169.34 | +0.96 | AMGN ahead |
| 2026-10-06 | 125.16 | 166.32 | +0.84 | AMGN ahead |
| 2026-10-05 | 125.28 | 166.78 | +0.81 | AMGN ahead |
| 2026-10-02 | 125.30 | 166.90 | +0.81 | AMGN ahead |
| 2026-10-01 | 126.62 | 170.09 | +0.67 | AMGN ahead |
| 2026-09-30 | 131.04 | 171.88 | +1.07 | AMGN ahead |
| 2026-09-29 | 131.70 | 174.45 | +0.92 | AMGN ahead |
| 2026-09-28 | 129.99 | 175.52 | +0.62 | AMGN ahead |
| 2026-09-25 | 128.90 | 174.04 | +0.62 | AMGN ahead |
| 2026-09-24 | 126.23 | 172.61 | +0.42 | near the usual relationship |
| 2026-09-23 | 126.25 | 174.55 | +0.25 | near the usual relationship |
| 2026-09-22 | 127.54 | 176.05 | +0.28 | near the usual relationship |
| 2026-09-21 | 122.23 | 173.62 | -0.17 | near the usual relationship |
| 2026-09-18 | 119.89 | 173.10 | -0.42 | near the usual relationship |
| 2026-09-17 | 118.07 | 174.00 | -0.74 | GILD ahead |
| 2026-09-16 | 117.00 | 170.30 | -0.54 | GILD ahead |
| 2026-09-15 | 116.78 | 168.70 | -0.42 | near the usual relationship |
| 2026-09-14 | 118.60 | 168.83 | -0.18 | near the usual relationship |
| 2026-09-11 | 117.31 | 165.73 | -0.06 | near the usual relationship |
| 2026-09-10 | 118.91 | 166.99 | +0.04 | near the usual relationship |
| 2026-09-09 | 121.64 | 167.95 | +0.31 | near the usual relationship |
| 2026-09-08 | 122.23 | 169.10 | +0.28 | near the usual relationship |
| 2026-09-04 | 135.93 | 174.12 | +1.48 | AMGN ahead |
| 2026-09-03 | 138.07 | 174.38 | +1.72 | AMGN ahead |
| 2026-09-02 | 137.67 | 172.52 | +1.86 | AMGN ahead |
| 2026-09-01 | 136.21 | 172.88 | +1.68 | AMGN ahead |
| 2026-08-31 | 133.64 | 168.75 | +1.78 | AMGN ahead |
| 2026-08-28 | 134.43 | 167.99 | +1.97 | AMGN ahead |
| 2026-08-27 | 135.85 | 171.66 | +1.81 | AMGN ahead |
| 2026-08-26 | 136.90 | 170.77 | +2.04 | AMGN ahead |
| 2026-08-25 | 137.49 | 171.55 | +2.06 | AMGN ahead |
| 2026-08-24 | 137.98 | 169.21 | +2.38 | AMGN ahead |
| 2026-08-21 | 136.58 | 168.50 | +2.32 | AMGN ahead |
| 2026-08-20 | 134.84 | 165.41 | +2.45 | AMGN ahead |
| 2026-08-19 | 137.52 | 170.20 | +2.33 | AMGN ahead |
| 2026-08-18 | 132.21 | 165.41 | +2.18 | AMGN ahead |
| 2026-08-17 | 130.38 | 160.19 | +2.53 | AMGN ahead |
| 2026-08-14 | 129.08 | 159.55 | +2.46 | AMGN ahead |
| 2026-08-13 | 129.90 | 159.29 | +2.64 | AMGN ahead |
| 2026-08-12 | 129.39 | 156.68 | +2.91 | AMGN ahead |
| 2026-08-11 | 128.80 | 156.56 | +2.89 | AMGN ahead |
| 2026-08-10 | 129.70 | 153.44 | +3.47 | AMGN ahead |
| 2026-08-07 | 127.76 | 153.61 | +3.25 | AMGN ahead |
| 2026-08-06 | 125.86 | 150.90 | +3.39 | AMGN ahead |
| 2026-08-05 | 126.79 | 151.94 | +3.49 | AMGN ahead |
| 2026-08-04 | 121.25 | 155.96 | +2.13 | AMGN ahead |
| 2026-08-03 | 117.79 | 151.23 | +2.20 | AMGN ahead |
| 2026-07-31 | 119.74 | 150.15 | +2.72 | AMGN ahead |
| 2026-07-30 | 120.51 | 151.38 | +2.73 | AMGN ahead |
| 2026-07-29 | 120.51 | 153.06 | +2.54 | AMGN ahead |
| 2026-07-28 | 122.21 | 154.89 | +2.62 | AMGN ahead |
| 2026-07-27 | 116.97 | 150.51 | +2.33 | AMGN ahead |
| 2026-07-24 | 116.91 | 149.11 | +2.55 | AMGN ahead |
| 2026-07-23 | 115.49 | 150.90 | +2.04 | AMGN ahead |
| 2026-07-22 | 113.80 | 150.30 | +1.82 | AMGN ahead |
| 2026-07-21 | 113.86 | 150.23 | +1.85 | AMGN ahead |
| 2026-07-20 | 113.22 | 153.61 | +1.24 | AMGN ahead |
| 2026-07-17 | 113.87 | 154.84 | +1.19 | AMGN ahead |
| 2026-07-16 | 115.52 | 157.17 | +1.19 | AMGN ahead |
| 2026-07-15 | 111.40 | 151.87 | +1.15 | AMGN ahead |
| 2026-07-14 | 110.44 | 149.95 | +1.24 | AMGN ahead |
| 2026-07-13 | 112.06 | 151.52 | +1.34 | AMGN ahead |
| 2026-07-10 | 112.97 | 149.71 | +1.79 | AMGN ahead |
| 2026-07-09 | 113.04 | 155.49 | +0.98 | AMGN ahead |
| 2026-07-08 | 114.40 | 156.62 | +1.08 | AMGN ahead |
| 2026-07-07 | 114.44 | 157.24 | +1.01 | AMGN ahead |
| 2026-07-06 | 113.92 | 149.46 | +2.05 | AMGN ahead |
| 2026-07-02 | 116.32 | 151.37 | +2.26 | AMGN ahead |
| 2026-07-01 | 112.33 | 145.26 | +2.44 | AMGN ahead |
| 2026-06-30 | 112.58 | 145.69 | +2.46 | AMGN ahead |
| 2026-06-29 | 112.09 | 145.68 | +2.40 | AMGN ahead |
| 2026-06-26 | 111.40 | 147.46 | +1.99 | AMGN ahead |
| 2026-06-25 | 109.69 | 142.80 | +2.41 | AMGN ahead |
| 2026-06-24 | 109.26 | 144.33 | +2.10 | AMGN ahead |
| 2026-06-23 | 107.88 | 144.20 | +1.83 | AMGN ahead |
| 2026-06-22 | 107.17 | 143.99 | +1.71 | AMGN ahead |
| 2026-06-18 | 104.96 | 142.71 | +1.43 | AMGN ahead |
| 2026-06-17 | 106.22 | 144.66 | +1.40 | AMGN ahead |
| 2026-06-16 | 108.14 | 146.71 | +1.49 | AMGN ahead |
| 2026-06-15 | 108.98 | 143.33 | +2.27 | AMGN ahead |
| 2026-06-12 | 110.43 | 144.82 | +2.37 | AMGN ahead |
| 2026-06-11 | 110.07 | 145.15 | +2.26 | AMGN ahead |
| 2026-06-10 | 105.00 | 140.08 | +1.99 | AMGN ahead |
| 2026-06-09 | 107.12 | 144.72 | +1.69 | AMGN ahead |
| 2026-06-08 | 107.48 | 147.72 | +1.27 | AMGN ahead |
| 2026-06-05 | 108.68 | 148.94 | +1.35 | AMGN ahead |
| 2026-06-04 | 107.44 | 148.96 | +1.06 | AMGN ahead |
| 2026-06-03 | 105.15 | 148.74 | +0.54 | AMGN ahead |
| 2026-06-02 | 102.05 | 147.11 | +0.07 | near the usual relationship |
| 2026-06-01 | 102.32 | 151.18 | -0.56 | GILD ahead |
| 2026-05-29 | 104.70 | 155.02 | -0.62 | GILD ahead |
| 2026-05-28 | 104.61 | 157.08 | -0.98 | GILD ahead |
| 2026-05-27 | 104.48 | 154.16 | -0.54 | GILD ahead |
| 2026-05-26 | 104.44 | 154.21 | -0.56 | GILD ahead |
| 2026-05-22 | 105.48 | 154.94 | -0.42 | near the usual relationship |
| 2026-05-21 | 104.90 | 150.48 | +0.18 | near the usual relationship |
| 2026-05-20 | 103.08 | 150.70 | -0.30 | near the usual relationship |
| 2026-05-19 | 102.83 | 150.48 | -0.33 | near the usual relationship |
| 2026-05-18 | 100.85 | 149.53 | -0.67 | GILD ahead |
| 2026-05-15 | 101.45 | 149.42 | -0.51 | GILD ahead |
| 2026-05-14 | 104.53 | 152.28 | -0.24 | near the usual relationship |
| 2026-05-13 | 104.60 | 153.42 | -0.41 | near the usual relationship |
| 2026-05-12 | 104.55 | 155.60 | -0.79 | GILD ahead |
| 2026-05-11 | 102.47 | 153.97 | -1.03 | GILD ahead |
| 2026-05-08 | 103.12 | 151.44 | -0.47 | near the usual relationship |
| 2026-05-07 | 102.31 | 154.59 | -1.18 | GILD ahead |
| 2026-05-06 | 102.94 | 157.17 | -1.45 | GILD ahead |
| 2026-05-05 | 102.47 | 153.92 | -1.06 | GILD ahead |
| 2026-05-04 | 100.68 | 153.01 | -1.35 | GILD ahead |
| 2026-05-01 | 102.54 | 151.81 | -0.71 | GILD ahead |
| 2026-04-30 | 107.64 | 150.88 | +0.63 | AMGN ahead |
| 2026-04-29 | 105.09 | 148.57 | +0.41 | near the usual relationship |
| 2026-04-28 | 105.57 | 149.05 | +0.44 | near the usual relationship |
| 2026-04-27 | 105.76 | 147.31 | +0.77 | AMGN ahead |
| 2026-04-24 | 107.12 | 150.37 | +0.59 | AMGN ahead |
| 2026-04-23 | 108.38 | 154.11 | +0.27 | near the usual relationship |
| 2026-04-22 | 107.54 | 153.25 | +0.22 | near the usual relationship |
| 2026-04-21 | 107.21 | 153.70 | +0.07 | near the usual relationship |
| 2026-04-20 | 108.86 | 156.68 | -0.03 | near the usual relationship |
| 2026-04-17 | 110.46 | 158.72 | +0.00 | near the usual relationship |
| 2026-04-16 | 108.62 | 159.77 | -0.57 | GILD ahead |
| 2026-04-15 | 108.26 | 161.17 | -0.87 | GILD ahead |
| 2026-04-14 | 109.11 | 161.96 | -0.80 | GILD ahead |
| 2026-04-13 | 108.75 | 160.32 | -0.65 | GILD ahead |
| 2026-04-10 | 109.13 | 160.27 | -0.56 | GILD ahead |
| 2026-04-09 | 110.55 | 163.85 | -0.78 | GILD ahead |
| 2026-04-08 | 108.75 | 163.21 | -1.09 | GILD ahead |
| 2026-04-07 | 105.70 | 160.06 | -1.31 | GILD ahead |
| 2026-04-06 | 106.50 | 161.59 | -1.37 | GILD ahead |
| 2026-04-02 | 108.17 | 161.10 | -0.94 | GILD ahead |
| 2026-04-01 | 109.83 | 161.79 | -0.68 | GILD ahead |
| 2026-03-31 | 109.39 | 160.71 | -0.63 | GILD ahead |
| 2026-03-30 | 108.50 | 157.22 | -0.31 | near the usual relationship |
| 2026-03-27 | 108.43 | 154.81 | +0.03 | near the usual relationship |
| 2026-03-26 | 109.79 | 157.84 | -0.14 | near the usual relationship |
| 2026-03-25 | 110.03 | 159.43 | -0.33 | near the usual relationship |
| 2026-03-24 | 108.32 | 159.26 | -0.66 | GILD ahead |
| 2026-03-23 | 108.74 | 158.37 | -0.46 | near the usual relationship |
| 2026-03-20 | 108.13 | 158.22 | -0.57 | GILD ahead |
| 2026-03-19 | 108.79 | 162.72 | -1.04 | GILD ahead |
| 2026-03-18 | 109.27 | 162.93 | -0.98 | GILD ahead |
| 2026-03-17 | 112.27 | 166.51 | -0.88 | GILD ahead |
| 2026-03-16 | 113.86 | 167.45 | -0.70 | GILD ahead |
| 2026-03-13 | 113.85 | 167.19 | -0.68 | GILD ahead |
| 2026-03-12 | 114.34 | 167.45 | -0.63 | GILD ahead |
| 2026-03-11 | 117.40 | 168.36 | -0.19 | near the usual relationship |
| 2026-03-10 | 116.72 | 171.31 | -0.68 | GILD ahead |
| 2026-03-09 | 117.20 | 169.08 | -0.33 | near the usual relationship |
| 2026-03-06 | 114.88 | 165.97 | -0.36 | near the usual relationship |
| 2026-03-05 | 114.28 | 167.37 | -0.65 | GILD ahead |
| 2026-03-04 | 117.91 | 170.92 | -0.44 | near the usual relationship |
| 2026-03-03 | 117.20 | 170.47 | -0.51 | GILD ahead |
| 2026-03-02 | 119.91 | 173.01 | -0.35 | near the usual relationship |
| 2026-02-27 | 120.67 | 171.76 | -0.07 | near the usual relationship |
| 2026-02-26 | 117.93 | 165.79 | +0.18 | near the usual relationship |
| 2026-02-25 | 119.48 | 169.65 | -0.03 | near the usual relationship |
| 2026-02-24 | 119.03 | 170.25 | -0.19 | near the usual relationship |
| 2026-02-23 | 117.96 | 172.77 | -0.68 | GILD ahead |
| 2026-02-20 | 116.51 | 174.58 | -1.16 | GILD ahead |
| 2026-02-19 | 116.74 | 174.26 | -1.09 | GILD ahead |
| 2026-02-18 | 118.05 | 176.13 | -1.09 | GILD ahead |
| 2026-02-17 | 116.07 | 179.05 | -1.79 | GILD ahead |
| 2026-02-13 | 114.78 | 178.71 | -2.00 | GILD ahead |
| 2026-02-12 | 113.85 | 175.06 | -1.73 | GILD ahead |
| 2026-02-11 | 113.97 | 179.66 | -2.24 | GILD ahead |
| 2026-02-10 | 113.37 | 169.78 | -1.21 | GILD ahead |
| 2026-02-09 | 116.84 | 174.91 | -1.20 | GILD ahead |
| 2026-02-06 | 119.48 | 175.85 | -0.87 | GILD ahead |
| 2026-02-05 | 114.34 | 172.24 | -1.32 | GILD ahead |
| 2026-02-04 | 113.85 | 168.62 | -1.00 | GILD ahead |
| 2026-02-03 | 105.26 | 165.22 | -2.12 | GILD ahead |
| 2026-02-02 | 107.16 | 164.77 | -1.74 | GILD ahead |
| 2026-01-30 | 106.29 | 163.69 | -1.78 | GILD ahead |
| 2026-01-29 | 106.62 | 160.92 | -1.41 | GILD ahead |
| 2026-01-28 | 106.39 | 161.12 | -1.48 | GILD ahead |
| 2026-01-27 | 109.22 | 162.56 | -1.16 | GILD ahead |
| 2026-01-26 | 108.71 | 158.88 | -0.83 | GILD ahead |
| 2026-01-23 | 107.18 | 156.75 | -0.85 | GILD ahead |
| 2026-01-22 | 107.90 | 151.22 | -0.07 | near the usual relationship |
| 2026-01-21 | 106.82 | 148.88 | +0.02 | near the usual relationship |
| 2026-01-20 | 102.90 | 143.15 | +0.05 | near the usual relationship |
| 2026-01-16 | 102.72 | 144.04 | -0.10 | near the usual relationship |
| 2026-01-15 | 102.60 | 139.83 | +0.40 | near the usual relationship |
| 2026-01-14 | 102.27 | 143.07 | -0.07 | near the usual relationship |
| 2026-01-13 | 100.82 | 140.41 | +0.00 | near the usual relationship |
| 2026-01-12 | 101.21 | 141.37 | -0.06 | near the usual relationship |
| 2026-01-09 | 101.38 | 139.64 | +0.18 | near the usual relationship |
| 2026-01-08 | 102.63 | 139.15 | +0.45 | near the usual relationship |
| 2026-01-07 | 106.21 | 143.39 | +0.52 | AMGN ahead |
| 2026-01-06 | 102.65 | 139.94 | +0.35 | near the usual relationship |
| 2026-01-05 | 99.71 | 136.42 | +0.28 | near the usual relationship |
| 2026-01-02 | 101.86 | 140.22 | +0.17 | near the usual relationship |
| 2025-12-31 | 101.76 | 141.54 | -0.01 | near the usual relationship |
| 2025-12-30 | 102.19 | 142.04 | +0.00 | near the usual relationship |
| 2025-12-29 | 102.48 | 144.04 | -0.19 | near the usual relationship |
| 2025-12-26 | 103.50 | 143.80 | +0.00 | near the usual relationship |
| 2025-12-24 | 103.82 | 144.91 | -0.08 | near the usual relationship |
| 2025-12-23 | 103.06 | 144.36 | -0.15 | near the usual relationship |
| 2025-12-22 | 103.02 | 143.17 | -0.02 | near the usual relationship |
| 2025-12-19 | 101.78 | 143.32 | -0.25 | near the usual relationship |
| 2025-12-18 | 100.86 | 140.07 | -0.02 | near the usual relationship |
| 2025-12-17 | 101.35 | 139.94 | +0.07 | near the usual relationship |
| 2025-12-16 | 101.58 | 136.97 | +0.46 | near the usual relationship |
| 2025-12-15 | 101.13 | 138.12 | +0.24 | near the usual relationship |
| 2025-12-12 | 98.78 | 138.84 | -0.24 | near the usual relationship |
| 2025-12-11 | 98.67 | 142.08 | -0.64 | GILD ahead |
| 2025-12-10 | 98.05 | 139.92 | -0.50 | GILD ahead |
| 2025-12-09 | 97.57 | 137.64 | -0.32 | near the usual relationship |
| 2025-12-08 | 99.87 | 139.75 | -0.20 | near the usual relationship |
| 2025-12-05 | 102.56 | 139.78 | +0.22 | near the usual relationship |
| 2025-12-04 | 105.75 | 141.40 | +0.52 | AMGN ahead |
| 2025-12-03 | 107.39 | 144.14 | +0.45 | near the usual relationship |
| 2025-12-02 | 105.19 | 142.89 | +0.25 | near the usual relationship |
| 2025-12-01 | 104.92 | 143.37 | +0.15 | near the usual relationship |
| 2025-11-28 | 107.40 | 145.11 | +0.31 | near the usual relationship |
| 2025-11-26 | 107.12 | 147.04 | +0.05 | near the usual relationship |
| 2025-11-25 | 106.05 | 146.59 | -0.06 | near the usual relationship |
| 2025-11-24 | 103.93 | 144.45 | -0.15 | near the usual relationship |
| 2025-11-21 | 104.94 | 146.03 | -0.18 | near the usual relationship |
| 2025-11-20 | 104.48 | 144.13 | -0.06 | near the usual relationship |
| 2025-11-19 | 106.45 | 147.68 | -0.15 | near the usual relationship |
| 2025-11-18 | 106.94 | 146.66 | +0.00 | near the usual relationship |
| 2025-11-17 | 106.23 | 143.09 | +0.24 | near the usual relationship |
| 2025-11-14 | 104.69 | 144.17 | -0.07 | near the usual relationship |
| 2025-11-13 | 104.46 | 144.37 | -0.13 | near the usual relationship |
| 2025-11-12 | 104.55 | 142.30 | +0.06 | near the usual relationship |
| 2025-11-11 | 105.22 | 141.33 | +0.23 | near the usual relationship |
| 2025-11-10 | 100.62 | 136.24 | +0.11 | near the usual relationship |
| 2025-11-07 | 99.55 | 137.04 | -0.12 | near the usual relationship |
| 2025-11-06 | 98.11 | 142.30 | -0.77 | GILD ahead |
| 2025-11-05 | 99.44 | 141.35 | -0.53 | GILD ahead |
| 2025-11-04 | 92.24 | 141.84 | -1.46 | GILD ahead |
| 2025-11-03 | 92.12 | 140.74 | -1.38 | GILD ahead |
| 2025-10-31 | 92.78 | 138.13 | -1.08 | GILD ahead |
| 2025-10-30 | 90.78 | 136.58 | -1.20 | GILD ahead |
| 2025-10-29 | 90.71 | 136.65 | -1.21 | GILD ahead |
| 2025-10-28 | 90.81 | 135.93 | -1.14 | GILD ahead |
| 2025-10-27 | 90.52 | 138.92 | -1.41 | GILD ahead |
| 2025-10-24 | 90.70 | 139.46 | -1.43 | GILD ahead |
| 2025-10-23 | 91.06 | 139.23 | -1.37 | GILD ahead |
| 2025-10-22 | 92.02 | 140.06 | -1.32 | GILD ahead |
| 2025-10-21 | 93.62 | 143.08 | -1.36 | GILD ahead |
| 2025-10-20 | 94.30 | 141.96 | -1.21 | GILD ahead |
| 2025-10-17 | 92.90 | 141.62 | -1.33 | GILD ahead |
| 2025-10-16 | 91.96 | 135.90 | -1.02 | GILD ahead |
| 2025-10-15 | 92.43 | 136.42 | -1.01 | GILD ahead |
| 2025-10-14 | 91.35 | 136.62 | -1.13 | GILD ahead |
| 2025-10-13 | 90.90 | 136.31 | -1.16 | GILD ahead |
| 2025-10-10 | 90.20 | 135.12 | -1.15 | GILD ahead |
| 2025-10-09 | 91.85 | 134.62 | -0.95 | GILD ahead |
| 2025-10-08 | 91.59 | 136.36 | -1.10 | GILD ahead |
| 2025-10-07 | 91.88 | 134.66 | -0.96 | GILD ahead |
| 2025-10-06 | 91.44 | 130.97 | -0.76 | GILD ahead |
| 2025-10-03 | 92.61 | 129.95 | -0.58 | GILD ahead |
| 2025-10-02 | 92.46 | 127.49 | -0.44 | near the usual relationship |
| 2025-10-01 | 92.80 | 128.17 | -0.46 | near the usual relationship |
| 2025-09-30 | 87.73 | 128.00 | -0.93 | GILD ahead |
| 2025-09-29 | 85.17 | 129.87 | -1.30 | GILD ahead |
| 2025-09-26 | 84.87 | 129.27 | -1.29 | GILD ahead |
| 2025-09-25 | 84.31 | 127.99 | -1.26 | GILD ahead |
| 2025-09-24 | 86.81 | 131.08 | -1.22 | GILD ahead |
| 2025-09-23 | 89.17 | 131.92 | -1.06 | GILD ahead |
| 2025-09-22 | 88.91 | 129.72 | -0.95 | GILD ahead |
| 2025-09-19 | 88.73 | 131.56 | -1.08 | GILD ahead |
| 2025-09-18 | 85.75 | 131.02 | -1.32 | GILD ahead |
| 2025-09-17 | 85.40 | 129.45 | -1.26 | GILD ahead |
| 2025-09-16 | 84.90 | 127.84 | -1.21 | GILD ahead |
| 2025-09-15 | 85.31 | 129.77 | -1.29 | GILD ahead |
| 2025-09-12 | 85.93 | 132.09 | -1.38 | GILD ahead |
| 2025-09-11 | 87.90 | 135.91 | -1.42 | GILD ahead |
| 2025-09-10 | 86.59 | 132.90 | -1.37 | GILD ahead |
| 2025-09-09 | 87.04 | 133.49 | -1.37 | GILD ahead |
| 2025-09-08 | 87.11 | 133.63 | -1.37 | GILD ahead |
| 2025-09-05 | 88.18 | 132.67 | -1.24 | GILD ahead |
| 2025-09-04 | 87.08 | 130.04 | -1.19 | GILD ahead |
| 2025-09-03 | 88.25 | 130.29 | -1.11 | GILD ahead |
| 2025-09-02 | 89.20 | 129.97 | -1.03 | GILD ahead |
| 2025-08-29 | 89.45 | 130.27 | -1.03 | GILD ahead |
| 2025-08-28 | 88.79 | 129.80 | -1.05 | GILD ahead |
| 2025-08-27 | 89.53 | 131.37 | -1.08 | GILD ahead |
| 2025-08-26 | 90.03 | 132.32 | -1.10 | GILD ahead |
| 2025-08-25 | 89.68 | 131.63 | -1.09 | GILD ahead |
| 2025-08-22 | 91.31 | 132.35 | -1.01 | GILD ahead |
| 2025-08-21 | 91.95 | 133.93 | -1.05 | GILD ahead |
| 2025-08-20 | 92.16 | 136.91 | -1.18 | GILD ahead |
| 2025-08-19 | 91.88 | 136.05 | -1.16 | GILD ahead |
| 2025-08-18 | 90.97 | 136.06 | -1.23 | GILD ahead |
| 2025-08-15 | 92.17 | 136.50 | -1.17 | GILD ahead |
| 2025-08-14 | 90.25 | 137.25 | -1.34 | GILD ahead |
| 2025-08-13 | 89.95 | 138.54 | -1.43 | GILD ahead |
| 2025-08-12 | 88.60 | 138.40 | -1.52 | GILD ahead |
| 2025-08-11 | 88.63 | 138.92 | -1.55 | GILD ahead |
| 2025-08-08 | 89.61 | 137.70 | -1.44 | GILD ahead |
| 2025-08-07 | 88.51 | 127.17 | -1.04 | GILD ahead |
| 2025-08-06 | 88.50 | 127.17 | -1.04 | GILD ahead |
| 2025-08-05 | 93.29 | 129.68 | -0.85 | GILD ahead |
| 2025-08-04 | 93.87 | 132.05 | -0.93 | GILD ahead |
| 2025-08-01 | 92.30 | 130.51 | -0.96 | GILD ahead |
| 2025-07-31 | 91.74 | 129.49 | -0.96 | GILD ahead |
| 2025-07-30 | 93.69 | 132.33 | -0.97 | GILD ahead |
| 2025-07-29 | 94.37 | 131.72 | -0.91 | GILD ahead |
| 2025-07-28 | 93.67 | 130.34 | -0.89 | GILD ahead |
| 2025-07-25 | 95.31 | 133.99 | -0.96 | GILD ahead |
| 2025-07-24 | 95.92 | 130.54 | -0.78 | GILD ahead |
| 2025-07-23 | 96.13 | 130.95 | -0.79 | GILD ahead |
| 2025-07-22 | 95.04 | 127.04 | -0.69 | GILD ahead |
| 2025-07-21 | 91.98 | 124.86 | -0.78 | GILD ahead |
| 2025-07-18 | 91.64 | 124.79 | -0.80 | GILD ahead |
| 2025-07-17 | 92.72 | 125.46 | -0.77 | GILD ahead |
| 2025-07-16 | 92.96 | 126.67 | -0.82 | GILD ahead |
| 2025-07-15 | 90.94 | 125.76 | -0.90 | GILD ahead |
| 2025-07-14 | 92.34 | 129.26 | -0.97 | GILD ahead |
| 2025-07-11 | 91.80 | 126.43 | -0.89 | GILD ahead |
| 2025-07-10 | 93.38 | 132.08 | -1.04 | GILD ahead |
| 2025-07-09 | 92.18 | 130.58 | -1.05 | GILD ahead |
| 2025-07-08 | 92.33 | 128.07 | -0.95 | GILD ahead |
| 2025-07-07 | 91.07 | 128.90 | -1.06 | GILD ahead |
| 2025-07-03 | 92.72 | 128.86 | -0.97 | GILD ahead |
| 2025-07-02 | 92.29 | 128.59 | -0.99 | GILD ahead |
| 2025-07-01 | 90.32 | 128.84 | -1.12 | GILD ahead |
| 2025-06-30 | 86.80 | 127.85 | -1.29 | GILD ahead |
| 2025-06-27 | 86.16 | 127.62 | -1.33 | GILD ahead |
| 2025-06-26 | 86.77 | 124.10 | -1.16 | GILD ahead |
| 2025-06-25 | 87.16 | 122.15 | -1.07 | GILD ahead |
| 2025-06-24 | 86.27 | 123.62 | -1.19 | GILD ahead |
| 2025-06-23 | 84.70 | 122.45 | -1.24 | GILD ahead |
| 2025-06-20 | 89.95 | 125.12 | -1.05 | GILD ahead |
| 2025-06-18 | 90.04 | 124.54 | -1.03 | GILD ahead |
| 2025-06-17 | 90.17 | 124.54 | -1.03 | GILD ahead |
| 2025-06-16 | 91.89 | 127.80 | -1.07 | GILD ahead |
| 2025-06-13 | 91.78 | 126.82 | -1.05 | GILD ahead |
| 2025-06-12 | 92.42 | 129.21 | -1.11 | GILD ahead |
| 2025-06-11 | 90.72 | 126.04 | -1.09 | GILD ahead |
| 2025-06-10 | 91.22 | 126.95 | -1.11 | GILD ahead |
| 2025-06-09 | 90.15 | 130.30 | -1.30 | GILD ahead |
| 2025-06-06 | 90.26 | 129.68 | -1.28 | GILD ahead |
| 2025-06-05 | 89.26 | 127.38 | -1.25 | GILD ahead |
| 2025-06-04 | 89.23 | 125.71 | -1.20 | GILD ahead |
| 2025-06-03 | 90.02 | 126.07 | -1.18 | GILD ahead |
| 2025-06-02 | 89.68 | 125.59 | -1.19 | GILD ahead |
| 2025-05-30 | 89.59 | 126.94 | -1.25 | GILD ahead |
| 2025-05-29 | 88.15 | 128.13 | -1.38 | GILD ahead |
| 2025-05-28 | 86.55 | 125.05 | -1.37 | GILD ahead |
| 2025-05-27 | 86.88 | 125.80 | -1.39 | GILD ahead |
| 2025-05-23 | 84.46 | 123.81 | -1.46 | GILD ahead |
| 2025-05-22 | 84.53 | 123.09 | -1.44 | GILD ahead |
| 2025-05-21 | 84.36 | 124.22 | -1.50 | GILD ahead |
| 2025-05-20 | 85.50 | 125.82 | -1.51 | GILD ahead |
| 2025-05-19 | 85.76 | 122.42 | -1.38 | GILD ahead |
| 2025-05-16 | 84.69 | 118.20 | -1.28 | GILD ahead |
| 2025-05-15 | 84.46 | 115.71 | -1.20 | GILD ahead |
| 2025-05-14 | 81.54 | 113.45 | -1.28 | GILD ahead |
| 2025-05-13 | 84.08 | 116.96 | -1.29 | GILD ahead |
| 2025-05-12 | 85.42 | 119.72 | -1.34 | GILD ahead |
| 2025-05-09 | 82.65 | 111.75 | -1.18 | GILD ahead |
| 2025-05-08 | 84.58 | 113.19 | -1.14 | GILD ahead |
| 2025-05-07 | 85.76 | 114.05 | -1.11 | GILD ahead |
| 2025-05-06 | 84.08 | 112.87 | -1.17 | GILD ahead |
| 2025-05-05 | 87.07 | 118.55 | -1.25 | GILD ahead |
| 2025-05-02 | 87.43 | 119.56 | -1.28 | GILD ahead |
| 2025-05-01 | 88.22 | 119.06 | -1.22 | GILD ahead |
| 2025-04-30 | 90.44 | 122.86 | -1.27 | GILD ahead |
| 2025-04-29 | 89.71 | 120.17 | -1.21 | GILD ahead |
| 2025-04-28 | 88.01 | 122.62 | -1.41 | GILD ahead |
| 2025-04-25 | 87.31 | 118.97 | -1.31 | GILD ahead |
| 2025-04-24 | 87.00 | 122.41 | -1.48 | GILD ahead |
| 2025-04-23 | 86.40 | 122.67 | -1.54 | GILD ahead |
| 2025-04-22 | 86.55 | 121.67 | -1.51 | GILD ahead |
| 2025-04-21 | 85.08 | 120.31 | -1.55 | GILD ahead |
| 2025-04-17 | 86.21 | 120.55 | -1.51 | GILD ahead |
| 2025-04-16 | 87.87 | 120.94 | -1.44 | GILD ahead |
| 2025-04-15 | 91.81 | 121.86 | -1.28 | GILD ahead |
| 2025-04-14 | 91.38 | 122.81 | -1.35 | GILD ahead |
| 2025-04-11 | 88.91 | 119.50 | -1.36 | GILD ahead |
| 2025-04-10 | 87.49 | 116.93 | -1.34 | GILD ahead |
| 2025-04-09 | 90.50 | 121.37 | -1.37 | GILD ahead |
| 2025-04-08 | 87.13 | 118.99 | -1.48 | GILD ahead |
| 2025-04-07 | 90.06 | 121.68 | -1.43 | GILD ahead |
| 2025-04-04 | 91.52 | 123.67 | -1.45 | GILD ahead |
| 2025-04-03 | 96.33 | 129.60 | -1.44 | GILD ahead |
| 2025-04-02 | 95.04 | 129.02 | -1.50 | GILD ahead |
| 2025-04-01 | 95.42 | 128.32 | -1.46 | GILD ahead |
| 2025-03-31 | 96.86 | 129.21 | -1.43 | GILD ahead |
| 2025-03-28 | 95.43 | 128.91 | -1.51 | GILD ahead |
| 2025-03-27 | 95.06 | 128.18 | -1.52 | GILD ahead |
| 2025-03-26 | 95.04 | 126.00 | -1.44 | GILD ahead |
| 2025-03-25 | 95.40 | 124.41 | -1.36 | GILD ahead |
| 2025-03-24 | 97.74 | 123.09 | -1.19 | GILD ahead |
| 2025-03-21 | 98.25 | 123.48 | -1.19 | GILD ahead |
| 2025-03-20 | 97.94 | 122.08 | -1.15 | GILD ahead |
| 2025-03-19 | 98.16 | 123.97 | -1.23 | GILD ahead |
| 2025-03-18 | 99.06 | 127.11 | -1.32 | GILD ahead |
| 2025-03-17 | 98.60 | 129.45 | -1.45 | GILD ahead |
| 2025-03-14 | 97.53 | 128.51 | -1.49 | GILD ahead |
| 2025-03-13 | 97.20 | 130.71 | -1.61 | GILD ahead |
| 2025-03-12 | 97.15 | 131.45 | -1.66 | GILD ahead |
| 2025-03-11 | 99.14 | 131.95 | -1.58 | GILD ahead |
| 2025-03-10 | 101.77 | 135.16 | -1.59 | GILD ahead |
| 2025-03-07 | 100.99 | 135.39 | -1.65 | GILD ahead |
| 2025-03-06 | 98.81 | 133.81 | -1.73 | GILD ahead |
| 2025-03-05 | 98.42 | 133.12 | -1.74 | GILD ahead |
| 2025-03-04 | 97.06 | 132.31 | -1.80 | GILD ahead |
| 2025-03-03 | 96.62 | 133.75 | -1.91 | GILD ahead |
| 2025-02-28 | 95.77 | 131.82 | -1.90 | GILD ahead |
| 2025-02-27 | 95.08 | 129.14 | -1.84 | GILD ahead |
| 2025-02-26 | 95.25 | 127.38 | -1.77 | GILD ahead |
| 2025-02-25 | 98.13 | 128.61 | -1.67 | GILD ahead |
| 2025-02-24 | 96.29 | 128.03 | -1.77 | GILD ahead |
| 2025-02-21 | 94.20 | 126.79 | -1.86 | GILD ahead |
| 2025-02-20 | 92.62 | 126.88 | -1.99 | GILD ahead |
| 2025-02-19 | 91.48 | 124.14 | -1.96 | GILD ahead |
| 2025-02-18 | 91.03 | 121.37 | -1.87 | GILD ahead |
| 2025-02-14 | 90.52 | 120.02 | -1.86 | GILD ahead |
| 2025-02-13 | 92.32 | 122.19 | -1.87 | GILD ahead |
| 2025-02-12 | 91.73 | 119.13 | -1.78 | GILD ahead |
| 2025-02-11 | 92.23 | 110.86 | -1.31 | GILD ahead |
| 2025-02-10 | 91.65 | 110.10 | -1.32 | GILD ahead |
| 2025-02-07 | 91.26 | 110.75 | -1.39 | GILD ahead |
| 2025-02-06 | 92.58 | 113.05 | -1.45 | GILD ahead |
| 2025-02-05 | 95.69 | 114.91 | -1.35 | GILD ahead |
| 2025-02-04 | 89.85 | 113.00 | -1.66 | GILD ahead |
| 2025-02-03 | 89.81 | 113.45 | -1.70 | GILD ahead |
| 2025-01-31 | 88.73 | 112.08 | -1.72 | GILD ahead |
| 2025-01-30 | 88.30 | 111.80 | -1.75 | GILD ahead |
| 2025-01-29 | 87.57 | 110.23 | -1.73 | GILD ahead |
| 2025-01-28 | 87.14 | 108.22 | -1.66 | GILD ahead |
| 2025-01-27 | 87.97 | 109.95 | -1.72 | GILD ahead |
| 2025-01-24 | 85.62 | 107.32 | -1.76 | GILD ahead |
| 2025-01-23 | 86.39 | 107.15 | -1.70 | GILD ahead |
| 2025-01-22 | 85.01 | 107.29 | -1.83 | GILD ahead |
| 2025-01-21 | 85.43 | 107.20 | -1.81 | GILD ahead |
| 2025-01-17 | 84.60 | 105.90 | -1.81 | GILD ahead |
| 2025-01-16 | 83.76 | 105.68 | -1.88 | GILD ahead |
| 2025-01-15 | 83.61 | 106.53 | -1.96 | GILD ahead |
| 2025-01-14 | 83.04 | 104.94 | -1.92 | GILD ahead |
| 2025-01-13 | 84.00 | 103.71 | -1.78 | GILD ahead |
| 2025-01-10 | 81.52 | 103.64 | -2.00 | GILD ahead |
| 2025-01-08 | 82.14 | 102.79 | -1.91 | GILD ahead |
| 2025-01-07 | 81.47 | 104.51 | -2.11 | GILD ahead |
| 2025-01-06 | 80.39 | 105.20 | -2.27 | GILD ahead |
| 2025-01-03 | 81.21 | 105.41 | -2.24 | GILD ahead |
| 2025-01-02 | 80.61 | 105.95 | -2.36 | GILD ahead |
| 2024-12-31 | 81.03 | 106.52 | -2.40 | GILD ahead |
| 2024-12-30 | 80.61 | 106.10 | -2.44 | GILD ahead |
| 2024-12-27 | 81.65 | 108.52 | -2.54 | GILD ahead |
| 2024-12-26 | 81.82 | 108.87 | -2.59 | GILD ahead |
| 2024-12-24 | 82.23 | 108.34 | -2.55 | GILD ahead |
| 2024-12-23 | 82.07 | 107.70 | -2.56 | GILD ahead |
| 2024-12-20 | 81.88 | 106.75 | -2.54 | GILD ahead |
| 2024-12-19 | 81.20 | 105.04 | -2.52 | GILD ahead |
| 2024-12-18 | 80.45 | 104.58 | -2.59 | GILD ahead |
| 2024-12-17 | 82.68 | 107.01 | -2.59 | GILD ahead |
| 2024-12-16 | 82.85 | 106.15 | -2.53 | GILD ahead |
| 2024-12-13 | 84.13 | 105.92 | -2.42 | GILD ahead |
| 2024-12-12 | 85.20 | 106.53 | -2.38 | GILD ahead |
| 2024-12-11 | 85.00 | 106.53 | -2.43 | GILD ahead |
| 2024-12-10 | 85.73 | 106.48 | -2.38 | GILD ahead |
| 2024-12-09 | 86.31 | 104.46 | -2.18 | GILD ahead |
| 2024-12-06 | 84.74 | 106.24 | -2.50 | GILD ahead |
| 2024-12-05 | 85.29 | 107.69 | -2.60 | GILD ahead |
| 2024-12-04 | 86.51 | 105.62 | -2.33 | GILD ahead |
| 2024-12-03 | 86.53 | 106.65 | -2.44 | GILD ahead |
| 2024-12-02 | 86.46 | 108.42 | -2.63 | GILD ahead |
| 2024-11-29 | 87.94 | 106.76 | -2.36 | GILD ahead |
| 2024-11-27 | 87.07 | 106.56 | -2.47 | GILD ahead |
| 2024-11-26 | 87.05 | 105.34 | -2.39 | GILD ahead |
| 2024-11-25 | 91.40 | 104.35 | -1.87 | GILD ahead |
| 2024-11-22 | 91.57 | 104.00 | -1.84 | GILD ahead |
| 2024-11-21 | 90.13 | 103.51 | -1.95 | GILD ahead |
| 2024-11-20 | 89.50 | 102.20 | -1.91 | GILD ahead |
| 2024-11-19 | 87.03 | 101.19 | -2.09 | GILD ahead |
| 2024-11-18 | 86.66 | 102.01 | -2.23 | GILD ahead |
| 2024-11-15 | 88.17 | 101.94 | -2.08 | GILD ahead |
| 2024-11-14 | 92.00 | 106.22 | -2.08 | GILD ahead |
| 2024-11-13 | 93.71 | 106.82 | -1.97 | GILD ahead |
| 2024-11-12 | 92.91 | 108.80 | -2.25 | GILD ahead |
| 2024-11-11 | 100.05 | 111.89 | -1.82 | GILD ahead |
| 2024-11-08 | 101.13 | 111.35 | -1.67 | GILD ahead |
| 2024-11-07 | 100.08 | 112.89 | -1.91 | GILD ahead |
| 2024-11-06 | 100.04 | 105.73 | -1.27 | GILD ahead |
| 2024-11-05 | 99.26 | 104.04 | -1.19 | GILD ahead |
| 2024-11-04 | 98.52 | 103.60 | -1.21 | GILD ahead |
| 2024-11-01 | 99.24 | 103.22 | -1.09 | GILD ahead |
| 2024-10-31 | 99.53 | 102.42 | -0.98 | GILD ahead |
| 2024-10-30 | 98.10 | 101.81 | -1.06 | GILD ahead |
| 2024-10-29 | 98.24 | 101.57 | -1.02 | GILD ahead |
| 2024-10-28 | 98.60 | 102.35 | -1.05 | GILD ahead |
| 2024-10-25 | 98.55 | 102.63 | -1.08 | GILD ahead |
| 2024-10-24 | 98.14 | 102.38 | -1.10 | GILD ahead |
| 2024-10-23 | 97.90 | 100.59 | -0.95 | GILD ahead |
| 2024-10-22 | 99.38 | 101.66 | -0.91 | GILD ahead |
| 2024-10-21 | 98.47 | 99.50 | -0.79 | GILD ahead |
| 2024-10-18 | 100.00 | 100.00 | -0.69 | GILD ahead |
One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Feb 12, 2025 (AMGN -0.5%, GILD +7.5%); Nov 5, 2025 (AMGN +7.8%, GILD -0.3%); Aug 5, 2026 (AMGN +4.6%, GILD -2.6%); Sep 8, 2026 (AMGN -10.1%, GILD -2.9%). Upcoming earnings: GILD Oct 29, 2026 (after-hours); AMGN Nov 3, 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
AMGN and GILD at a glance
AMGN Amgen Inc.
- Listing
- Nasdaq · SEC CIK 318154
- Industry
- Biotechnology: Biological Products (No Diagnostic Substances) · SIC 2836 Biological Products, (No Diagnostic Substances)
- Market value
- $229.7B
- Price history
- 2,521 daily closes, Oct 12, 2016 to Oct 22, 2026
GILD Gilead Sciences Inc.
- Listing
- Nasdaq · SEC CIK 882095
- Industry
- Biotechnology: Biological Products (No Diagnostic Substances) · SIC 2836 Biological Products, (No Diagnostic Substances)
- Market value
- $189.8B
- 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 AMGN and GILD
| Pair | Status | Ahead now | Industry |
|---|---|---|---|
| GILD / MRNA | Watchlist | MRNA by 2.04 sd | Biotechnology: Biological Products (No Diagnostic Substances) |
| AMGN / MRNA | Watchlist | MRNA by 2.01 sd | Biotechnology: Biological Products (No Diagnostic Substances) |
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.
