AMZNVSCOST• 7 Days (Normalized)
AMZN vs COST (Amazon.com Inc. vs Costco Wholesale Corporation)
Normalized cumulative comparison anchored at 0.00% baseline to illustrate pure alpha, return divergence, and market momentum.
AMZN Performance $258.51
-2.97%
Amazon.com Inc.
Normalized Baseline0.00%
COST Performance $915.74
-3.14%
Costco Wholesale Corporation
Normalized Baseline0.00%
Alpha Spread Margin AMZN LEADS
+0.17%
AMZN outperforming by 0.17%
AMZNCOST
Spread Trajectory7 Days (Normalized)
Cumulative Performance Trajectory
Interactive divergence comparison normalized at 0.00% on start date.
AMZN COST
Comparative Historical Ledger
Daily closing prices, normalized percentages, and relative spread divergence.
Historical Quotes & Breakdown(6 dates)
| Date | AMZN Price | AMZN Gain (%) | COST Price | COST Gain (%) | Spread |
|---|---|---|---|---|---|
| Aug 28, 2026 | $266.43 | +0.00% | $945.47 | +0.00% | +0.00% |
| Aug 31, 2026 | $259.77 | -2.50% | $943.89 | -0.17% | -2.33% |
| Sep 01, 2026 | $254.92 | -4.32% | $939.96 | -0.58% | -3.74% |
| Sep 02, 2026 | $254.98 | -4.30% | $928.48 | -1.80% | -2.50% |
| Sep 03, 2026 | $258.90 | -2.83% | $925.41 | -2.12% | -0.71% |
| Sep 04, 2026 | $258.51 | -2.97% | $915.74 | -3.14% | +0.17% |