Costco Wholesale Corporation vs Walmart Inc.
WatchlistCOST / WMTPrices through Oct 22, 2026
Why these are rivals: #1 and #2 by market value ($942B vs $441B) in Nasdaq's "Department/Specialty Retail Stores" industry; SEC SIC 5331 / 5331 (same major group); #1 and #2 by market value ($942B vs $441B) with SEC SIC 5331 (Retail-Variety Stores).
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: -2.45 (needs <= -2.873 (5% critical value))
Business leadership
WMT is the larger business
Annual revenue reported to the SEC. Scale, not market share.
| Year | COST | WMT | Larger |
|---|---|---|---|
| 2025 | $275.2B | $713.2B | WMT |
| 2024 | $254.5B | $681.0B | WMT |
| 2023 | $242.3B | $648.1B | WMT |
| 2022 | $227.0B | $611.3B | WMT |
| 2021 | $195.9B | $572.8B | WMT |
| 2020 | $166.8B | $559.2B | WMT |
WMT led in every year with figures for both. Market value: COST $441.1B, WMT $941.7B.
Stock leadership
COST is ahead now
Measured against the pair's own last 252 trading days.
COST leads WMT by 0.46 standard deviations: +2.4% over its usual price ratio. 1 lead switch in the last year.
| Price change | 3 mo | 6 mo | 12 mo |
|---|---|---|---|
| COST | +8.9% | +0.4% | +8.6% |
| WMT | +10.6% | -8.3% | +14.0% |
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: 0.61 (needs >= 0.60)
- Fail
- Mean reversion: ADF t-statistic of the spread: -2.45 (needs <= -2.873 (5% critical value))
- Pass
- Speed: half-life of the spread, sessions: 17.84 (needs <= 63)
- Data
- Both stocks current
The twins over two years
Prices side by side, and the gap between them
COST Costco Wholesale Corporation WMT Walmart 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: COST relative to WMT, against the 252 sessions before each day. Above 0: COST ahead; below 0: WMT ahead. Lines at +/-2 (idea) and +/-4 (stop).
Data table (504 sessions)
| Date | COST index | WMT index | z | Ahead |
|---|---|---|---|---|
| 2026-10-22 | 114.46 | 148.96 | +0.46 | near the usual relationship |
| 2026-10-21 | 112.23 | 144.88 | +0.62 | COST ahead |
| 2026-10-20 | 111.81 | 144.94 | +0.53 | COST ahead |
| 2026-10-19 | 111.91 | 145.98 | +0.41 | near the usual relationship |
| 2026-10-16 | 111.19 | 146.12 | +0.25 | near the usual relationship |
| 2026-10-15 | 109.94 | 144.96 | +0.18 | near the usual relationship |
| 2026-10-14 | 110.39 | 142.86 | +0.54 | COST ahead |
| 2026-10-13 | 107.31 | 138.09 | +0.64 | COST ahead |
| 2026-10-12 | 107.86 | 139.07 | +0.59 | COST ahead |
| 2026-10-09 | 106.45 | 136.95 | +0.63 | COST ahead |
| 2026-10-08 | 106.56 | 135.97 | +0.78 | COST ahead |
| 2026-10-07 | 105.92 | 133.02 | +1.08 | COST ahead |
| 2026-10-06 | 105.18 | 131.84 | +1.11 | COST ahead |
| 2026-10-05 | 103.82 | 129.22 | +1.24 | COST ahead |
| 2026-10-02 | 103.49 | 128.23 | +1.32 | COST ahead |
| 2026-10-01 | 102.85 | 128.23 | +1.20 | COST ahead |
| 2026-09-30 | 102.34 | 127.81 | +1.16 | COST ahead |
| 2026-09-29 | 103.94 | 131.35 | +0.94 | COST ahead |
| 2026-09-28 | 103.75 | 133.72 | +0.56 | COST ahead |
| 2026-09-25 | 103.73 | 132.80 | +0.67 | COST ahead |
| 2026-09-24 | 100.78 | 132.32 | +0.20 | near the usual relationship |
| 2026-09-23 | 101.70 | 135.94 | -0.14 | near the usual relationship |
| 2026-09-22 | 101.11 | 135.43 | -0.18 | near the usual relationship |
| 2026-09-21 | 101.00 | 132.14 | +0.23 | near the usual relationship |
| 2026-09-18 | 100.65 | 131.26 | +0.28 | near the usual relationship |
| 2026-09-17 | 100.49 | 131.34 | +0.23 | near the usual relationship |
| 2026-09-16 | 100.47 | 132.21 | +0.10 | near the usual relationship |
| 2026-09-15 | 101.33 | 132.94 | +0.15 | near the usual relationship |
| 2026-09-14 | 103.30 | 134.15 | +0.31 | near the usual relationship |
| 2026-09-11 | 101.71 | 131.78 | +0.34 | near the usual relationship |
| 2026-09-10 | 101.44 | 130.03 | +0.51 | COST ahead |
| 2026-09-09 | 101.47 | 130.16 | +0.48 | near the usual relationship |
| 2026-09-08 | 102.32 | 130.43 | +0.58 | COST ahead |
| 2026-09-04 | 102.94 | 131.77 | +0.50 | COST ahead |
| 2026-09-03 | 104.03 | 133.34 | +0.46 | near the usual relationship |
| 2026-09-02 | 104.38 | 130.48 | +0.85 | COST ahead |
| 2026-09-01 | 105.67 | 130.27 | +1.06 | COST ahead |
| 2026-08-31 | 106.11 | 128.98 | +1.26 | COST ahead |
| 2026-08-28 | 106.29 | 126.79 | +1.53 | COST ahead |
| 2026-08-27 | 105.07 | 126.22 | +1.41 | COST ahead |
| 2026-08-26 | 107.48 | 128.32 | +1.49 | COST ahead |
| 2026-08-25 | 107.92 | 129.60 | +1.38 | COST ahead |
| 2026-08-24 | 109.20 | 130.97 | +1.38 | COST ahead |
| 2026-08-21 | 106.54 | 127.54 | +1.40 | COST ahead |
| 2026-08-20 | 104.94 | 127.71 | +1.14 | COST ahead |
| 2026-08-19 | 107.58 | 140.57 | +0.08 | near the usual relationship |
| 2026-08-18 | 108.07 | 141.68 | +0.03 | near the usual relationship |
| 2026-08-17 | 107.19 | 140.61 | +0.01 | near the usual relationship |
| 2026-08-14 | 108.04 | 141.77 | +0.00 | near the usual relationship |
| 2026-08-13 | 108.13 | 142.32 | -0.05 | near the usual relationship |
| 2026-08-12 | 106.75 | 142.68 | -0.28 | near the usual relationship |
| 2026-08-11 | 106.16 | 139.29 | -0.03 | near the usual relationship |
| 2026-08-10 | 107.10 | 138.56 | +0.16 | near the usual relationship |
| 2026-08-07 | 106.55 | 137.56 | +0.18 | near the usual relationship |
| 2026-08-06 | 106.70 | 137.83 | +0.17 | near the usual relationship |
| 2026-08-05 | 105.89 | 138.16 | +0.03 | near the usual relationship |
| 2026-08-04 | 106.55 | 137.19 | +0.20 | near the usual relationship |
| 2026-08-03 | 107.25 | 136.16 | +0.38 | near the usual relationship |
| 2026-07-31 | 107.01 | 136.76 | +0.28 | near the usual relationship |
| 2026-07-30 | 107.26 | 136.64 | +0.32 | near the usual relationship |
| 2026-07-29 | 109.50 | 140.47 | +0.22 | near the usual relationship |
| 2026-07-28 | 108.66 | 139.10 | +0.24 | near the usual relationship |
| 2026-07-27 | 106.97 | 137.42 | +0.18 | near the usual relationship |
| 2026-07-24 | 105.11 | 134.63 | +0.21 | near the usual relationship |
| 2026-07-23 | 104.10 | 133.32 | +0.21 | near the usual relationship |
| 2026-07-22 | 104.24 | 134.46 | +0.11 | near the usual relationship |
| 2026-07-21 | 104.46 | 135.76 | +0.00 | near the usual relationship |
| 2026-07-20 | 105.20 | 137.99 | -0.12 | near the usual relationship |
| 2026-07-17 | 105.77 | 140.50 | -0.28 | near the usual relationship |
| 2026-07-16 | 106.30 | 141.37 | -0.31 | near the usual relationship |
| 2026-07-15 | 103.03 | 138.40 | -0.43 | near the usual relationship |
| 2026-07-14 | 103.62 | 139.84 | -0.50 | WMT ahead |
| 2026-07-13 | 104.14 | 141.16 | -0.55 | WMT ahead |
| 2026-07-10 | 103.00 | 140.08 | -0.60 | WMT ahead |
| 2026-07-09 | 102.63 | 138.00 | -0.47 | near the usual relationship |
| 2026-07-08 | 107.15 | 139.10 | -0.07 | near the usual relationship |
| 2026-07-07 | 106.51 | 137.18 | +0.01 | near the usual relationship |
| 2026-07-06 | 106.82 | 136.08 | +0.13 | near the usual relationship |
| 2026-07-02 | 106.98 | 137.55 | +0.02 | near the usual relationship |
| 2026-07-01 | 103.95 | 133.83 | -0.01 | near the usual relationship |
| 2026-06-30 | 105.16 | 139.29 | -0.33 | near the usual relationship |
| 2026-06-29 | 106.42 | 140.94 | -0.34 | near the usual relationship |
| 2026-06-26 | 107.08 | 142.28 | -0.38 | near the usual relationship |
| 2026-06-25 | 105.92 | 142.39 | -0.51 | WMT ahead |
| 2026-06-24 | 108.04 | 146.35 | -0.60 | WMT ahead |
| 2026-06-23 | 107.66 | 146.87 | -0.68 | WMT ahead |
| 2026-06-22 | 106.95 | 144.12 | -0.56 | WMT ahead |
| 2026-06-18 | 106.96 | 144.12 | -0.56 | WMT ahead |
| 2026-06-17 | 108.55 | 145.28 | -0.50 | WMT ahead |
| 2026-06-16 | 110.92 | 148.85 | -0.53 | WMT ahead |
| 2026-06-15 | 110.10 | 148.59 | -0.60 | WMT ahead |
| 2026-06-12 | 110.43 | 148.86 | -0.59 | WMT ahead |
| 2026-06-11 | 109.68 | 148.20 | -0.62 | WMT ahead |
| 2026-06-10 | 110.55 | 148.31 | -0.55 | WMT ahead |
| 2026-06-09 | 108.88 | 146.21 | -0.57 | WMT ahead |
| 2026-06-08 | 109.58 | 147.37 | -0.59 | WMT ahead |
| 2026-06-05 | 109.25 | 146.21 | -0.55 | WMT ahead |
| 2026-06-04 | 109.31 | 144.80 | -0.45 | near the usual relationship |
| 2026-06-03 | 108.12 | 143.76 | -0.50 | WMT ahead |
| 2026-06-02 | 107.27 | 139.05 | -0.25 | near the usual relationship |
| 2026-06-01 | 106.36 | 140.94 | -0.48 | near the usual relationship |
| 2026-05-29 | 107.50 | 142.36 | -0.47 | near the usual relationship |
| 2026-05-28 | 111.88 | 146.23 | -0.36 | near the usual relationship |
| 2026-05-27 | 112.83 | 145.79 | -0.25 | near the usual relationship |
| 2026-05-26 | 112.74 | 145.82 | -0.27 | near the usual relationship |
| 2026-05-22 | 115.59 | 147.92 | -0.17 | near the usual relationship |
| 2026-05-21 | 118.09 | 149.23 | -0.07 | near the usual relationship |
| 2026-05-20 | 120.73 | 160.93 | -0.57 | WMT ahead |
| 2026-05-19 | 123.02 | 165.05 | -0.63 | WMT ahead |
| 2026-05-18 | 121.01 | 163.99 | -0.73 | WMT ahead |
| 2026-05-15 | 117.92 | 161.67 | -0.84 | WMT ahead |
| 2026-05-14 | 117.05 | 162.91 | -0.99 | WMT ahead |
| 2026-05-13 | 116.13 | 161.69 | -1.00 | WMT ahead |
| 2026-05-12 | 114.87 | 160.31 | -1.03 | WMT ahead |
| 2026-05-11 | 112.36 | 156.92 | -1.04 | WMT ahead |
| 2026-05-08 | 113.40 | 160.41 | -1.17 | WMT ahead |
| 2026-05-07 | 113.77 | 160.13 | -1.13 | WMT ahead |
| 2026-05-06 | 111.94 | 159.98 | -1.28 | WMT ahead |
| 2026-05-05 | 114.26 | 160.85 | -1.15 | WMT ahead |
| 2026-05-04 | 113.85 | 160.29 | -1.16 | WMT ahead |
| 2026-05-01 | 113.73 | 161.85 | -1.27 | WMT ahead |
| 2026-04-30 | 114.05 | 162.26 | -1.27 | WMT ahead |
| 2026-04-29 | 112.27 | 157.43 | -1.15 | WMT ahead |
| 2026-04-28 | 111.74 | 156.92 | -1.17 | WMT ahead |
| 2026-04-27 | 112.19 | 156.92 | -1.15 | WMT ahead |
| 2026-04-24 | 113.67 | 159.78 | -1.20 | WMT ahead |
| 2026-04-23 | 114.03 | 162.38 | -1.33 | WMT ahead |
| 2026-04-22 | 112.83 | 159.86 | -1.29 | WMT ahead |
| 2026-04-21 | 113.07 | 159.39 | -1.26 | WMT ahead |
| 2026-04-20 | 112.17 | 157.32 | -1.22 | WMT ahead |
| 2026-04-17 | 112.40 | 156.81 | -1.18 | WMT ahead |
| 2026-04-16 | 110.98 | 153.51 | -1.11 | WMT ahead |
| 2026-04-15 | 110.70 | 153.44 | -1.14 | WMT ahead |
| 2026-04-14 | 109.58 | 153.79 | -1.26 | WMT ahead |
| 2026-04-13 | 110.26 | 153.20 | -1.18 | WMT ahead |
| 2026-04-10 | 112.24 | 155.91 | -1.18 | WMT ahead |
| 2026-04-09 | 116.02 | 158.81 | -1.06 | WMT ahead |
| 2026-04-08 | 115.82 | 156.51 | -0.96 | WMT ahead |
| 2026-04-07 | 113.90 | 150.65 | -0.77 | WMT ahead |
| 2026-04-06 | 114.50 | 155.93 | -1.04 | WMT ahead |
| 2026-04-02 | 114.10 | 154.70 | -1.01 | WMT ahead |
| 2026-04-01 | 112.03 | 153.41 | -1.10 | WMT ahead |
| 2026-03-31 | 112.01 | 152.85 | -1.08 | WMT ahead |
| 2026-03-30 | 112.03 | 151.89 | -1.03 | WMT ahead |
| 2026-03-27 | 110.60 | 151.14 | -1.10 | WMT ahead |
| 2026-03-26 | 110.13 | 150.26 | -1.10 | WMT ahead |
| 2026-03-25 | 109.59 | 151.35 | -1.21 | WMT ahead |
| 2026-03-24 | 109.47 | 150.10 | -1.16 | WMT ahead |
| 2026-03-23 | 108.56 | 148.47 | -1.15 | WMT ahead |
| 2026-03-20 | 109.30 | 146.38 | -0.97 | WMT ahead |
| 2026-03-19 | 109.58 | 148.92 | -1.11 | WMT ahead |
| 2026-03-18 | 110.16 | 150.02 | -1.13 | WMT ahead |
| 2026-03-17 | 111.98 | 153.83 | -1.22 | WMT ahead |
| 2026-03-16 | 112.61 | 154.95 | -1.24 | WMT ahead |
| 2026-03-13 | 113.36 | 155.60 | -1.23 | WMT ahead |
| 2026-03-12 | 112.79 | 154.14 | -1.20 | WMT ahead |
| 2026-03-11 | 111.54 | 151.88 | -1.18 | WMT ahead |
| 2026-03-10 | 112.12 | 153.88 | -1.26 | WMT ahead |
| 2026-03-09 | 113.01 | 152.92 | -1.15 | WMT ahead |
| 2026-03-06 | 112.20 | 152.26 | -1.18 | WMT ahead |
| 2026-03-05 | 110.46 | 151.65 | -1.29 | WMT ahead |
| 2026-03-04 | 113.17 | 157.19 | -1.40 | WMT ahead |
| 2026-03-03 | 113.29 | 157.31 | -1.41 | WMT ahead |
| 2026-03-02 | 112.73 | 156.32 | -1.41 | WMT ahead |
| 2026-02-27 | 113.63 | 157.36 | -1.41 | WMT ahead |
| 2026-02-26 | 110.92 | 153.02 | -1.39 | WMT ahead |
| 2026-02-25 | 111.83 | 154.66 | -1.42 | WMT ahead |
| 2026-02-24 | 112.24 | 155.88 | -1.47 | WMT ahead |
| 2026-02-23 | 110.84 | 154.73 | -1.53 | WMT ahead |
| 2026-02-20 | 110.76 | 151.26 | -1.35 | WMT ahead |
| 2026-02-19 | 111.05 | 153.57 | -1.47 | WMT ahead |
| 2026-02-18 | 111.97 | 155.73 | -1.53 | WMT ahead |
| 2026-02-17 | 113.77 | 158.47 | -1.56 | WMT ahead |
| 2026-02-13 | 114.49 | 164.67 | -1.86 | WMT ahead |
| 2026-02-12 | 112.29 | 164.36 | -2.04 | WMT ahead |
| 2026-02-11 | 109.96 | 158.37 | -1.92 | WMT ahead |
| 2026-02-10 | 109.18 | 155.82 | -1.86 | WMT ahead |
| 2026-02-09 | 112.14 | 158.68 | -1.80 | WMT ahead |
| 2026-02-06 | 112.55 | 161.33 | -1.94 | WMT ahead |
| 2026-02-05 | 111.21 | 156.12 | -1.77 | WMT ahead |
| 2026-02-04 | 109.98 | 157.42 | -1.97 | WMT ahead |
| 2026-02-03 | 109.93 | 157.07 | -1.98 | WMT ahead |
| 2026-02-02 | 108.86 | 152.58 | -1.83 | WMT ahead |
| 2026-01-30 | 105.70 | 146.53 | -1.74 | WMT ahead |
| 2026-01-29 | 107.12 | 144.40 | -1.49 | WMT ahead |
| 2026-01-28 | 108.01 | 143.36 | -1.36 | WMT ahead |
| 2026-01-27 | 109.07 | 143.82 | -1.31 | WMT ahead |
| 2026-01-26 | 109.90 | 144.68 | -1.31 | WMT ahead |
| 2026-01-23 | 110.53 | 144.79 | -1.27 | WMT ahead |
| 2026-01-22 | 109.74 | 144.91 | -1.36 | WMT ahead |
| 2026-01-21 | 110.49 | 146.80 | -1.43 | WMT ahead |
| 2026-01-20 | 108.40 | 146.00 | -1.57 | WMT ahead |
| 2026-01-16 | 108.32 | 147.21 | -1.68 | WMT ahead |
| 2026-01-15 | 107.55 | 146.60 | -1.72 | WMT ahead |
| 2026-01-14 | 106.90 | 147.63 | -1.87 | WMT ahead |
| 2026-01-13 | 105.89 | 148.03 | -2.01 | WMT ahead |
| 2026-01-12 | 106.02 | 145.09 | -1.83 | WMT ahead |
| 2026-01-09 | 103.97 | 140.86 | -1.74 | WMT ahead |
| 2026-01-08 | 102.89 | 139.06 | -1.74 | WMT ahead |
| 2026-01-07 | 99.22 | 138.63 | -2.10 | WMT ahead |
| 2026-01-06 | 99.95 | 140.62 | -2.20 | WMT ahead |
| 2026-01-05 | 98.45 | 138.62 | -2.24 | WMT ahead |
| 2026-01-02 | 96.06 | 138.68 | -2.53 | WMT ahead |
| 2025-12-31 | 96.94 | 137.02 | -2.35 | WMT ahead |
| 2025-12-30 | 97.31 | 137.65 | -2.39 | WMT ahead |
| 2025-12-29 | 97.56 | 138.40 | -2.46 | WMT ahead |
| 2025-12-26 | 98.18 | 137.42 | -2.36 | WMT ahead |
| 2025-12-24 | 98.01 | 137.26 | -2.40 | WMT ahead |
| 2025-12-23 | 96.09 | 136.39 | -2.59 | WMT ahead |
| 2025-12-22 | 95.55 | 138.48 | -2.88 | WMT ahead |
| 2025-12-19 | 96.18 | 140.65 | -3.04 | WMT ahead |
| 2025-12-18 | 96.41 | 141.22 | -3.14 | WMT ahead |
| 2025-12-17 | 96.97 | 142.25 | -3.23 | WMT ahead |
| 2025-12-16 | 96.72 | 141.95 | -3.32 | WMT ahead |
| 2025-12-15 | 96.74 | 143.64 | -3.55 | WMT ahead |
| 2025-12-12 | 99.43 | 143.52 | -3.29 | WMT ahead |
| 2025-12-11 | 99.43 | 142.07 | -3.23 | WMT ahead |
| 2025-12-10 | 98.30 | 139.20 | -3.19 | WMT ahead |
| 2025-12-09 | 99.87 | 141.51 | -3.28 | WMT ahead |
| 2025-12-08 | 99.77 | 139.66 | -3.19 | WMT ahead |
| 2025-12-05 | 100.58 | 141.57 | -3.35 | WMT ahead |
| 2025-12-04 | 100.71 | 141.24 | -3.39 | WMT ahead |
| 2025-12-03 | 103.68 | 140.71 | -2.99 | WMT ahead |
| 2025-12-02 | 103.65 | 138.25 | -2.79 | WMT ahead |
| 2025-12-01 | 102.52 | 137.17 | -2.89 | WMT ahead |
| 2025-11-28 | 102.70 | 135.91 | -2.78 | WMT ahead |
| 2025-11-26 | 102.10 | 134.18 | -2.72 | WMT ahead |
| 2025-11-25 | 100.54 | 131.60 | -2.71 | WMT ahead |
| 2025-11-24 | 99.61 | 127.98 | -2.46 | WMT ahead |
| 2025-11-21 | 101.06 | 129.53 | -2.46 | WMT ahead |
| 2025-11-20 | 100.42 | 131.73 | -2.87 | WMT ahead |
| 2025-11-19 | 100.12 | 123.74 | -1.95 | WMT ahead |
| 2025-11-18 | 100.62 | 124.70 | -2.01 | WMT ahead |
| 2025-11-17 | 102.59 | 126.61 | -1.97 | WMT ahead |
| 2025-11-14 | 103.76 | 126.04 | -1.73 | WMT ahead |
| 2025-11-13 | 103.99 | 126.11 | -1.72 | WMT ahead |
| 2025-11-12 | 102.75 | 127.22 | -2.07 | WMT ahead |
| 2025-11-11 | 102.73 | 127.22 | -2.10 | WMT ahead |
| 2025-11-10 | 102.92 | 125.96 | -1.93 | WMT ahead |
| 2025-11-07 | 103.73 | 126.17 | -1.85 | WMT ahead |
| 2025-11-06 | 103.82 | 125.05 | -1.70 | WMT ahead |
| 2025-11-05 | 105.11 | 124.79 | -1.48 | WMT ahead |
| 2025-11-04 | 105.75 | 125.78 | -1.52 | WMT ahead |
| 2025-11-03 | 104.33 | 124.94 | -1.65 | WMT ahead |
| 2025-10-31 | 102.46 | 124.44 | -1.91 | WMT ahead |
| 2025-10-30 | 103.44 | 125.73 | -1.94 | WMT ahead |
| 2025-10-29 | 102.57 | 126.01 | -2.15 | WMT ahead |
| 2025-10-28 | 103.89 | 126.88 | -2.07 | WMT ahead |
| 2025-10-27 | 104.53 | 128.48 | -2.21 | WMT ahead |
| 2025-10-24 | 104.79 | 130.57 | -2.48 | WMT ahead |
| 2025-10-23 | 105.90 | 131.42 | -2.45 | WMT ahead |
| 2025-10-22 | 106.20 | 131.77 | -2.48 | WMT ahead |
| 2025-10-21 | 105.39 | 130.64 | -2.50 | WMT ahead |
| 2025-10-20 | 105.23 | 131.66 | -2.71 | WMT ahead |
| 2025-10-17 | 105.26 | 132.49 | -2.87 | WMT ahead |
| 2025-10-16 | 104.05 | 130.94 | -2.92 | WMT ahead |
| 2025-10-15 | 107.36 | 134.09 | -2.83 | WMT ahead |
| 2025-10-14 | 106.40 | 131.85 | -2.72 | WMT ahead |
| 2025-10-13 | 105.17 | 125.59 | -2.05 | WMT ahead |
| 2025-10-10 | 104.55 | 125.25 | -2.13 | WMT ahead |
| 2025-10-09 | 106.00 | 125.16 | -1.88 | WMT ahead |
| 2025-10-08 | 102.84 | 126.55 | -2.70 | WMT ahead |
| 2025-10-07 | 102.84 | 126.97 | -2.82 | WMT ahead |
| 2025-10-06 | 102.40 | 126.31 | -2.85 | WMT ahead |
| 2025-10-03 | 102.90 | 125.53 | -2.68 | WMT ahead |
| 2025-10-02 | 103.06 | 125.08 | -2.62 | WMT ahead |
| 2025-10-01 | 103.12 | 125.40 | -2.70 | WMT ahead |
| 2025-09-30 | 104.05 | 126.75 | -2.78 | WMT ahead |
| 2025-09-29 | 103.07 | 126.77 | -3.03 | WMT ahead |
| 2025-09-26 | 102.97 | 126.87 | -3.13 | WMT ahead |
| 2025-09-25 | 106.04 | 126.74 | -2.52 | WMT ahead |
| 2025-09-24 | 106.26 | 126.34 | -2.43 | WMT ahead |
| 2025-09-23 | 106.07 | 126.09 | -2.45 | WMT ahead |
| 2025-09-22 | 106.04 | 126.45 | -2.55 | WMT ahead |
| 2025-09-19 | 106.92 | 125.85 | -2.30 | WMT ahead |
| 2025-09-18 | 107.06 | 127.41 | -2.56 | WMT ahead |
| 2025-09-17 | 108.26 | 128.24 | -2.49 | WMT ahead |
| 2025-09-16 | 107.03 | 127.19 | -2.59 | WMT ahead |
| 2025-09-15 | 107.93 | 127.52 | -2.49 | WMT ahead |
| 2025-09-12 | 108.81 | 127.28 | -2.30 | WMT ahead |
| 2025-09-11 | 108.40 | 126.25 | -2.22 | WMT ahead |
| 2025-09-10 | 107.50 | 123.49 | -1.94 | WMT ahead |
| 2025-09-09 | 110.08 | 125.80 | -1.84 | WMT ahead |
| 2025-09-08 | 109.25 | 125.79 | -2.01 | WMT ahead |
| 2025-09-05 | 108.31 | 123.61 | -1.84 | WMT ahead |
| 2025-09-04 | 107.46 | 124.13 | -2.11 | WMT ahead |
| 2025-09-03 | 106.77 | 122.30 | -1.94 | WMT ahead |
| 2025-09-02 | 105.54 | 120.34 | -1.86 | WMT ahead |
| 2025-08-29 | 106.04 | 119.27 | -1.56 | WMT ahead |
| 2025-08-28 | 106.23 | 118.20 | -1.34 | WMT ahead |
| 2025-08-27 | 106.74 | 118.17 | -1.24 | WMT ahead |
| 2025-08-26 | 105.82 | 118.13 | -1.42 | WMT ahead |
| 2025-08-25 | 105.85 | 118.15 | -1.43 | WMT ahead |
| 2025-08-22 | 107.75 | 119.09 | -1.22 | WMT ahead |
| 2025-08-21 | 109.01 | 120.48 | -1.23 | WMT ahead |
| 2025-08-20 | 111.80 | 126.15 | -1.65 | WMT ahead |
| 2025-08-19 | 110.26 | 124.57 | -1.68 | WMT ahead |
| 2025-08-18 | 110.09 | 123.85 | -1.59 | WMT ahead |
| 2025-08-15 | 109.27 | 122.99 | -1.59 | WMT ahead |
| 2025-08-14 | 109.65 | 124.03 | -1.68 | WMT ahead |
| 2025-08-13 | 110.04 | 124.20 | -1.63 | WMT ahead |
| 2025-08-12 | 111.43 | 127.44 | -1.87 | WMT ahead |
| 2025-08-11 | 111.15 | 127.82 | -1.98 | WMT ahead |
| 2025-08-08 | 110.28 | 127.57 | -2.10 | WMT ahead |
| 2025-08-07 | 109.88 | 126.82 | -2.08 | WMT ahead |
| 2025-08-06 | 108.88 | 127.12 | -2.31 | WMT ahead |
| 2025-08-05 | 106.08 | 122.14 | -2.07 | WMT ahead |
| 2025-08-04 | 107.40 | 122.48 | -1.91 | WMT ahead |
| 2025-08-01 | 107.08 | 121.13 | -1.78 | WMT ahead |
| 2025-07-31 | 105.63 | 120.50 | -1.95 | WMT ahead |
| 2025-07-30 | 104.27 | 120.02 | -2.14 | WMT ahead |
| 2025-07-29 | 105.06 | 120.93 | -2.16 | WMT ahead |
| 2025-07-28 | 104.99 | 120.05 | -2.05 | WMT ahead |
| 2025-07-25 | 105.16 | 119.87 | -2.01 | WMT ahead |
| 2025-07-24 | 104.97 | 118.80 | -1.89 | WMT ahead |
| 2025-07-23 | 105.80 | 117.67 | -1.58 | WMT ahead |
| 2025-07-22 | 105.85 | 117.88 | -1.61 | WMT ahead |
| 2025-07-21 | 106.52 | 117.66 | -1.47 | WMT ahead |
| 2025-07-18 | 106.90 | 116.90 | -1.29 | WMT ahead |
| 2025-07-17 | 107.23 | 116.95 | -1.25 | WMT ahead |
| 2025-07-16 | 106.95 | 117.02 | -1.31 | WMT ahead |
| 2025-07-15 | 108.78 | 117.32 | -1.06 | WMT ahead |
| 2025-07-14 | 110.27 | 117.80 | -0.89 | WMT ahead |
| 2025-07-11 | 109.08 | 116.10 | -0.83 | WMT ahead |
| 2025-07-10 | 109.06 | 116.66 | -0.92 | WMT ahead |
| 2025-07-09 | 110.40 | 119.06 | -1.06 | WMT ahead |
| 2025-07-08 | 110.82 | 119.41 | -1.05 | WMT ahead |
| 2025-07-07 | 111.54 | 122.19 | -1.33 | WMT ahead |
| 2025-07-03 | 110.96 | 120.97 | -1.25 | WMT ahead |
| 2025-07-02 | 110.43 | 120.05 | -1.21 | WMT ahead |
| 2025-07-01 | 110.84 | 120.82 | -1.26 | WMT ahead |
| 2025-06-30 | 111.28 | 120.26 | -1.12 | WMT ahead |
| 2025-06-27 | 110.74 | 119.63 | -1.12 | WMT ahead |
| 2025-06-26 | 110.49 | 118.09 | -0.96 | WMT ahead |
| 2025-06-25 | 110.90 | 119.62 | -1.11 | WMT ahead |
| 2025-06-24 | 112.63 | 120.53 | -0.99 | WMT ahead |
| 2025-06-23 | 112.92 | 120.37 | -0.93 | WMT ahead |
| 2025-06-20 | 110.20 | 118.21 | -1.03 | WMT ahead |
| 2025-06-18 | 109.59 | 116.95 | -0.95 | WMT ahead |
| 2025-06-17 | 109.91 | 115.91 | -0.78 | WMT ahead |
| 2025-06-16 | 110.66 | 115.96 | -0.69 | WMT ahead |
| 2025-06-13 | 111.31 | 116.15 | -0.64 | WMT ahead |
| 2025-06-12 | 112.72 | 116.63 | -0.52 | WMT ahead |
| 2025-06-11 | 112.05 | 117.82 | -0.76 | WMT ahead |
| 2025-06-10 | 113.23 | 119.69 | -0.84 | WMT ahead |
| 2025-06-09 | 113.11 | 119.85 | -0.88 | WMT ahead |
| 2025-06-06 | 114.09 | 119.87 | -0.77 | WMT ahead |
| 2025-06-05 | 113.63 | 120.48 | -0.90 | WMT ahead |
| 2025-06-04 | 118.23 | 122.19 | -0.55 | WMT ahead |
| 2025-06-03 | 118.66 | 122.96 | -0.59 | WMT ahead |
| 2025-06-02 | 118.81 | 122.70 | -0.55 | WMT ahead |
| 2025-05-30 | 116.93 | 121.41 | -0.63 | WMT ahead |
| 2025-05-29 | 113.40 | 119.42 | -0.83 | WMT ahead |
| 2025-05-28 | 113.89 | 119.59 | -0.80 | WMT ahead |
| 2025-05-27 | 114.41 | 120.01 | -0.79 | WMT ahead |
| 2025-05-23 | 113.37 | 118.48 | -0.75 | WMT ahead |
| 2025-05-22 | 114.45 | 117.98 | -0.56 | WMT ahead |
| 2025-05-21 | 115.26 | 118.60 | -0.55 | WMT ahead |
| 2025-05-20 | 116.55 | 120.28 | -0.59 | WMT ahead |
| 2025-05-19 | 116.28 | 120.67 | -0.67 | WMT ahead |
| 2025-05-16 | 115.32 | 120.82 | -0.81 | WMT ahead |
| 2025-05-15 | 113.59 | 118.50 | -0.75 | WMT ahead |
| 2025-05-14 | 111.46 | 119.09 | -1.07 | WMT ahead |
| 2025-05-13 | 112.31 | 117.92 | -0.85 | WMT ahead |
| 2025-05-12 | 114.23 | 118.99 | -0.76 | WMT ahead |
| 2025-05-09 | 113.32 | 118.95 | -0.86 | WMT ahead |
| 2025-05-08 | 113.28 | 119.83 | -0.97 | WMT ahead |
| 2025-05-07 | 113.22 | 121.55 | -1.17 | WMT ahead |
| 2025-05-06 | 113.60 | 121.20 | -1.10 | WMT ahead |
| 2025-05-05 | 114.09 | 122.16 | -1.15 | WMT ahead |
| 2025-05-02 | 113.35 | 121.45 | -1.17 | WMT ahead |
| 2025-05-01 | 112.31 | 119.80 | -1.12 | WMT ahead |
| 2025-04-30 | 111.80 | 119.60 | -1.17 | WMT ahead |
| 2025-04-29 | 111.48 | 118.12 | -1.05 | WMT ahead |
| 2025-04-28 | 110.00 | 117.11 | -1.12 | WMT ahead |
| 2025-04-25 | 109.85 | 116.95 | -1.13 | WMT ahead |
| 2025-04-24 | 109.66 | 117.87 | -1.26 | WMT ahead |
| 2025-04-23 | 109.70 | 116.79 | -1.15 | WMT ahead |
| 2025-04-22 | 110.08 | 116.65 | -1.10 | WMT ahead |
| 2025-04-21 | 107.67 | 113.65 | -1.06 | WMT ahead |
| 2025-04-17 | 111.80 | 114.65 | -0.69 | WMT ahead |
| 2025-04-16 | 108.79 | 112.15 | -0.76 | WMT ahead |
| 2025-04-15 | 109.82 | 115.57 | -1.04 | WMT ahead |
| 2025-04-14 | 110.09 | 116.50 | -1.12 | WMT ahead |
| 2025-04-11 | 108.30 | 114.13 | -1.07 | WMT ahead |
| 2025-04-10 | 108.40 | 111.44 | -0.76 | WMT ahead |
| 2025-04-09 | 108.50 | 110.20 | -0.61 | WMT ahead |
| 2025-04-08 | 102.16 | 100.59 | -0.21 | near the usual relationship |
| 2025-04-07 | 102.09 | 103.10 | -0.54 | WMT ahead |
| 2025-04-04 | 103.03 | 102.31 | -0.33 | near the usual relationship |
| 2025-04-03 | 108.71 | 107.32 | -0.25 | near the usual relationship |
| 2025-04-02 | 108.49 | 110.39 | -0.65 | WMT ahead |
| 2025-04-01 | 107.29 | 109.25 | -0.66 | WMT ahead |
| 2025-03-31 | 106.32 | 107.97 | -0.64 | WMT ahead |
| 2025-03-28 | 104.51 | 104.72 | -0.47 | near the usual relationship |
| 2025-03-27 | 105.53 | 105.31 | -0.42 | near the usual relationship |
| 2025-03-26 | 104.52 | 104.80 | -0.49 | near the usual relationship |
| 2025-03-25 | 104.58 | 104.24 | -0.41 | near the usual relationship |
| 2025-03-24 | 104.10 | 107.60 | -0.89 | WMT ahead |
| 2025-03-21 | 102.21 | 105.74 | -0.90 | WMT ahead |
| 2025-03-20 | 100.66 | 105.53 | -1.08 | WMT ahead |
| 2025-03-19 | 101.63 | 106.17 | -1.05 | WMT ahead |
| 2025-03-18 | 100.95 | 105.26 | -1.03 | WMT ahead |
| 2025-03-17 | 103.04 | 107.56 | -1.05 | WMT ahead |
| 2025-03-14 | 101.61 | 104.97 | -0.93 | WMT ahead |
| 2025-03-13 | 100.12 | 103.92 | -0.99 | WMT ahead |
| 2025-03-12 | 104.22 | 104.78 | -0.59 | WMT ahead |
| 2025-03-11 | 104.60 | 107.54 | -0.88 | WMT ahead |
| 2025-03-10 | 105.04 | 108.01 | -0.89 | WMT ahead |
| 2025-03-07 | 108.40 | 112.80 | -1.05 | WMT ahead |
| 2025-03-06 | 115.41 | 116.39 | -0.66 | WMT ahead |
| 2025-03-05 | 117.78 | 118.04 | -0.58 | WMT ahead |
| 2025-03-04 | 116.56 | 116.80 | -0.59 | WMT ahead |
| 2025-03-03 | 117.68 | 120.02 | -0.82 | WMT ahead |
| 2025-02-28 | 117.88 | 121.28 | -0.94 | WMT ahead |
| 2025-02-27 | 114.86 | 119.04 | -1.04 | WMT ahead |
| 2025-02-26 | 116.01 | 118.31 | -0.84 | WMT ahead |
| 2025-02-25 | 118.67 | 120.15 | -0.75 | WMT ahead |
| 2025-02-24 | 116.42 | 115.20 | -0.47 | near the usual relationship |
| 2025-02-21 | 116.35 | 116.57 | -0.63 | WMT ahead |
| 2025-02-20 | 116.33 | 119.55 | -0.96 | WMT ahead |
| 2025-02-19 | 119.45 | 127.91 | -1.49 | WMT ahead |
| 2025-02-18 | 118.71 | 127.63 | -1.55 | WMT ahead |
| 2025-02-14 | 120.49 | 127.95 | -1.41 | WMT ahead |
| 2025-02-13 | 121.06 | 129.20 | -1.48 | WMT ahead |
| 2025-02-12 | 119.74 | 127.43 | -1.46 | WMT ahead |
| 2025-02-11 | 118.97 | 126.02 | -1.41 | WMT ahead |
| 2025-02-10 | 119.38 | 126.58 | -1.44 | WMT ahead |
| 2025-02-07 | 117.34 | 124.40 | -1.45 | WMT ahead |
| 2025-02-06 | 118.15 | 126.49 | -1.59 | WMT ahead |
| 2025-02-05 | 117.24 | 126.01 | -1.65 | WMT ahead |
| 2025-02-04 | 114.87 | 123.93 | -1.72 | WMT ahead |
| 2025-02-03 | 113.07 | 122.42 | -1.78 | WMT ahead |
| 2025-01-31 | 110.15 | 120.72 | -1.96 | WMT ahead |
| 2025-01-30 | 110.06 | 121.33 | -2.06 | WMT ahead |
| 2025-01-29 | 108.37 | 119.91 | -2.14 | WMT ahead |
| 2025-01-28 | 107.77 | 119.65 | -2.21 | WMT ahead |
| 2025-01-27 | 108.51 | 119.79 | -2.16 | WMT ahead |
| 2025-01-24 | 105.63 | 116.54 | -2.18 | WMT ahead |
| 2025-01-23 | 105.91 | 115.37 | -2.03 | WMT ahead |
| 2025-01-22 | 106.20 | 114.66 | -1.94 | WMT ahead |
| 2025-01-21 | 106.54 | 114.48 | -1.89 | WMT ahead |
| 2025-01-17 | 106.03 | 113.07 | -1.81 | WMT ahead |
| 2025-01-16 | 103.39 | 112.29 | -2.08 | WMT ahead |
| 2025-01-15 | 103.82 | 112.34 | -2.06 | WMT ahead |
| 2025-01-14 | 103.11 | 111.66 | -2.09 | WMT ahead |
| 2025-01-13 | 103.95 | 112.57 | -2.12 | WMT ahead |
| 2025-01-10 | 105.33 | 114.38 | -2.19 | WMT ahead |
| 2025-01-08 | 104.25 | 112.90 | -2.18 | WMT ahead |
| 2025-01-07 | 103.58 | 111.68 | -2.15 | WMT ahead |
| 2025-01-06 | 103.73 | 112.45 | -2.25 | WMT ahead |
| 2025-01-03 | 103.04 | 111.65 | -2.28 | WMT ahead |
| 2025-01-02 | 102.28 | 110.69 | -2.30 | WMT ahead |
| 2024-12-31 | 103.00 | 111.12 | -2.28 | WMT ahead |
| 2024-12-30 | 103.67 | 111.39 | -2.25 | WMT ahead |
| 2024-12-27 | 105.64 | 112.73 | -2.18 | WMT ahead |
| 2024-12-26 | 107.48 | 114.12 | -2.13 | WMT ahead |
| 2024-12-24 | 107.79 | 113.98 | -2.09 | WMT ahead |
| 2024-12-23 | 106.78 | 111.12 | -1.86 | WMT ahead |
| 2024-12-20 | 107.25 | 113.44 | -2.14 | WMT ahead |
| 2024-12-19 | 107.33 | 114.87 | -2.35 | WMT ahead |
| 2024-12-18 | 108.45 | 115.05 | -2.24 | WMT ahead |
| 2024-12-17 | 110.40 | 117.35 | -2.30 | WMT ahead |
| 2024-12-16 | 111.61 | 116.68 | -2.07 | WMT ahead |
| 2024-12-13 | 111.22 | 115.91 | -2.05 | WMT ahead |
| 2024-12-12 | 111.11 | 115.72 | -2.06 | WMT ahead |
| 2024-12-11 | 111.82 | 116.79 | -2.13 | WMT ahead |
| 2024-12-10 | 111.67 | 116.28 | -2.11 | WMT ahead |
| 2024-12-09 | 111.05 | 115.40 | -2.11 | WMT ahead |
| 2024-12-06 | 111.58 | 117.70 | -2.39 | WMT ahead |
| 2024-12-05 | 110.42 | 117.21 | -2.53 | WMT ahead |
| 2024-12-04 | 111.39 | 116.16 | -2.26 | WMT ahead |
| 2024-12-03 | 110.41 | 115.00 | -2.27 | WMT ahead |
| 2024-12-02 | 109.60 | 113.93 | -2.26 | WMT ahead |
| 2024-11-29 | 109.25 | 113.76 | -2.31 | WMT ahead |
| 2024-11-27 | 108.09 | 113.00 | -2.41 | WMT ahead |
| 2024-11-26 | 109.21 | 112.30 | -2.14 | WMT ahead |
| 2024-11-25 | 108.02 | 110.07 | -1.99 | WMT ahead |
| 2024-11-22 | 108.37 | 111.23 | -2.14 | WMT ahead |
| 2024-11-21 | 107.43 | 108.71 | -1.90 | WMT ahead |
| 2024-11-20 | 104.33 | 107.22 | -2.20 | WMT ahead |
| 2024-11-19 | 104.56 | 106.51 | -2.05 | WMT ahead |
| 2024-11-18 | 103.37 | 103.41 | -1.72 | WMT ahead |
| 2024-11-15 | 101.97 | 103.62 | -2.00 | WMT ahead |
| 2024-11-14 | 103.86 | 103.89 | -1.70 | WMT ahead |
| 2024-11-13 | 104.97 | 105.15 | -1.71 | WMT ahead |
| 2024-11-12 | 104.81 | 104.53 | -1.61 | WMT ahead |
| 2024-11-11 | 104.87 | 103.57 | -1.42 | WMT ahead |
| 2024-11-08 | 106.10 | 104.33 | -1.32 | WMT ahead |
| 2024-11-07 | 102.74 | 103.12 | -1.67 | WMT ahead |
| 2024-11-06 | 101.09 | 102.62 | -1.85 | WMT ahead |
| 2024-11-05 | 100.07 | 102.91 | -2.06 | WMT ahead |
| 2024-11-04 | 99.61 | 101.40 | -1.86 | WMT ahead |
| 2024-11-01 | 98.62 | 101.08 | -1.95 | WMT ahead |
| 2024-10-31 | 98.27 | 100.79 | -1.95 | WMT ahead |
| 2024-10-30 | 98.82 | 100.10 | -1.72 | WMT ahead |
| 2024-10-29 | 99.71 | 100.48 | -1.61 | WMT ahead |
| 2024-10-28 | 100.16 | 101.77 | -1.73 | WMT ahead |
| 2024-10-25 | 100.19 | 101.48 | -1.66 | WMT ahead |
| 2024-10-24 | 100.43 | 102.13 | -1.71 | WMT ahead |
| 2024-10-23 | 101.08 | 102.41 | -1.63 | WMT ahead |
| 2024-10-22 | 100.44 | 100.87 | -1.49 | WMT ahead |
| 2024-10-21 | 99.69 | 99.39 | -1.36 | WMT ahead |
| 2024-10-18 | 100.00 | 100.00 | -1.40 | WMT ahead |
One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Nov 20, 2025 (COST +0.3%, WMT +6.5%); May 21, 2026 (COST -2.2%, WMT -7.3%); Aug 20, 2026 (COST -2.5%, WMT -9.2%).
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
COST and WMT at a glance
COST Costco Wholesale Corporation
- Listing
- Nasdaq · SEC CIK 909832
- Industry
- Department/Specialty Retail Stores · SIC 5331 Retail-Variety Stores
- Market value
- $441.1B
- Price history
- 2,521 daily closes, Oct 12, 2016 to Oct 22, 2026
WMT Walmart Inc.
- Listing
- Nasdaq · SEC CIK 104169
- Industry
- Department/Specialty Retail Stores · SIC 5331 Retail-Variety Stores
- Market value
- $941.7B
- 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 COST and WMT
| Pair | Status | Ahead now | Industry |
|---|---|---|---|
| WMT / TGT | Watchlist | TGT by 1.08 sd | Department/Specialty Retail Stores |
| COST / TGT | Watchlist | TGT by 1.07 sd | Department/Specialty Retail Stores |
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.
