https://mercatusdata.com/stocks/cost/ Each trading day on which Costco (COST) changed state on mercatusdata: a factor flip, a badge change, a moving-average cross or a new SEC filing, with the change itself. Quiet days and notable moves are not included. Facts only; reporting, not advice. en Tue, 20 Oct 2026 00:00:00 +0000 https://mercatusdata.com/stocks/cost/?d=2026-10-20 mercatusdata:stocks:COST:2026-10-20 Tue, 20 Oct 2026 00:00:00 +0000 52-week range: Upper portion → Middle (60.0% → 59.6% of range). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-19 mercatusdata:stocks:COST:2026-10-19 Mon, 19 Oct 2026 00:00:00 +0000 20d MA crossed above 50d MA; 52-week range: Middle → Upper portion (57.5% → 60.0% of range). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-16 mercatusdata:stocks:COST:2026-10-16 Fri, 16 Oct 2026 00:00:00 +0000 RSI 72.5 — crossed above 70 (overbought boundary); New SEC filing: 8-K dated 2026-10-16 (EDGAR). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-15 mercatusdata:stocks:COST:2026-10-15 Thu, 15 Oct 2026 00:00:00 +0000 crossed above 200d MA (2nd consecutive close above; now 1.30% above it); RSI 69.6 — crossed below 70 (overbought boundary); Volatility: Low → Normal (20-day volatility 24th → 25th pctile). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-14 mercatusdata:stocks:COST:2026-10-14 Wed, 14 Oct 2026 00:00:00 +0000 RSI 72.1 — crossed above 70 (overbought boundary); Price vs moving averages factor: Mixed → Above trend MAs (price vs 20/50/200-day MA: +6.18% · +5.33% · +1.77%); Relative performance factor: Underperforming → Outperforming (vs the S&P 500 over 20/60/252 days: +7.66% · +2.89% · -11.03%); New SEC filing: 8-K dated 2026-10-14 (EDGAR). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-09 mercatusdata:stocks:COST:2026-10-09 Fri, 09 Oct 2026 00:00:00 +0000 Relative performance factor: Outperforming → Underperforming (vs S&P 500 (20/60/252d): +2.64% · -3.54% · -12.15%). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-08 mercatusdata:stocks:COST:2026-10-08 Thu, 08 Oct 2026 00:00:00 +0000 Relative performance factor: Underperforming → Outperforming (vs S&P 500 (20/60/252d): +2.76% · +0.88% · -12.03%); 52-week range: Lower portion → Middle (38.9% → 41.1% of range). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-07 mercatusdata:stocks:COST:2026-10-07 Wed, 07 Oct 2026 00:00:00 +0000 crossed above 50d MA (2nd consecutive close above) (now +1.09% above it); MACD crossed above zero; 5-day volatility entered the quietest 10% of its history (2nd pctile); Volatility: Normal → Low (20-day volatility 25th → 23rd pctile); New SEC filing: 10-K dated 2026-10-07 (EDGAR). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-06 mercatusdata:stocks:COST:2026-10-06 Tue, 06 Oct 2026 00:00:00 +0000 Price vs moving averages factor: Below trend MAs → Mixed (price vs 20/50/200-day MA: +2.89% · +0.33% · -2.75%); Volatility: Low → Normal (20-day volatility 23rd → 25th pctile). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-05 mercatusdata:stocks:COST:2026-10-05 Mon, 05 Oct 2026 00:00:00 +0000 Medium-term trend factor: Negative → Positive (20/60/120-day returns: +0.85% · +0.79% · -5.26%); Volatility: Normal → Low (20-day volatility 25th → 23rd pctile). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-02 mercatusdata:stocks:COST:2026-10-02 Fri, 02 Oct 2026 00:00:00 +0000 Volatility: Low → Normal (20-day volatility 24th → 25th pctile). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-10-01 mercatusdata:stocks:COST:2026-10-01 Thu, 01 Oct 2026 00:00:00 +0000 Volatility: Normal → Low (20-day volatility 26th → 24th pctile). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-09-30 mercatusdata:stocks:COST:2026-09-30 Wed, 30 Sep 2026 00:00:00 +0000 Volatility: Low → Normal (20-day volatility 22nd → 26th pctile). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-09-28 mercatusdata:stocks:COST:2026-09-28 Mon, 28 Sep 2026 00:00:00 +0000 crossed above 20d MA (2nd consecutive close above) (now +1.30% above it); Volatility: Normal → Low (20-day volatility 25th → 22nd pctile). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-09-25 mercatusdata:stocks:COST:2026-09-25 Fri, 25 Sep 2026 00:00:00 +0000 Short-term momentum factor: Fading → Improving (5/10-day returns: +3.07% · +1.99%); Volatility: Low → Normal (20-day volatility 16th → 25th pctile). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-09-22 mercatusdata:stocks:COST:2026-09-22 Tue, 22 Sep 2026 00:00:00 +0000 5-day volatility entered the quietest 10% of its history (5th pctile). Facts only; reporting, not advice. https://mercatusdata.com/stocks/cost/?d=2026-09-10 mercatusdata:stocks:COST:2026-09-10 Thu, 10 Sep 2026 00:00:00 +0000 20d MA crossed below 50d MA. Facts only; reporting, not advice.