UMC
Underperforming without a clear catalyst yet
- UMC −3.39% on the last session vs SPY +0.09%: −3.5 pts of stock-specific move.
- Market backdrop (Today): Core PPI m/m 1.3% vs 0.3% expected (hotter); Core Retail Sales m/m 0.9% vs 0.6% expected (stronger); S&P futures -0.08%, 10-year yield -3bp in the 30 minutes after.
Best and worst times to own UMC in the past two years
Buying and selling at the close. Each colored stretch is the best or worst window for that holding period, green for a gain and red for a loss: longer holds are wider and darker underneath, shorter ones brighter on top. The grey line is the full two years. Letters mark events inside the windows (E earnings, A analyst, I insider, M mention spike, V volume spike, T theme move, N news). Hover a period above the chart to pick it out and see only its events; click it to hide or show it.
Best and worst window per holding period
| Best | Worst | |||||||
|---|---|---|---|---|---|---|---|---|
| Hold for | Buy | Sell | Gain | Rank | Buy | Sell | Gain | Rank |
| one single day | Jan 16, 2026 | Jan 20, 2026 | +15.9% | #69 | Jul 15, 2026 | Jul 16, 2026 | -10.6% | #148 |
| one week | Apr 13, 2026 | Apr 20, 2026 | +30.3% | #37 | Jan 27, 2026 | Feb 3, 2026 | -21.1% | #65 |
| one month | Apr 28, 2026 | May 28, 2026 | +94.5% | #12 | Jun 29, 2026 | Jul 29, 2026 | -35.1% | #29 |
| 3 months | Mar 30, 2026 | Jun 30, 2026 | +216.0% | #7 | Oct 22, 2024 | Jan 22, 2025 | -26.7% | #150 |
| 6 months | Dec 24, 2025 | Jun 24, 2026 | +250.1% | #13 | Oct 15, 2024 | Jan 24, 2025 | -28.4% | #125 |
| one year | Oct 2, 2025 | Oct 2, 2026 | +266.7% | #26 | Oct 15, 2024 | Jan 24, 2025 | -28.4% | #134 |
Rank #37 for the best one week means 36 of the S&P 500 components had a better best-one week gain over the past year; for the worst windows #1 is the deepest fall. Updated .
What happened in each window
From Wallsti's event record (Aftermath's events over the two years, plus the AI-read news catalysts, which only cover recent weeks). An event is no proof of cause: check the dates against the line.
Today vs. the best starting days
| As of | 1d | 1w | 1m | 3m | 6m | 1y |
|---|---|---|---|---|---|---|
| Today Oct 15, 2026 |
-3.4% | -9.4% | -4.3% | -17.0% | +111.4% | +183.5% |
| Best one single day Jan 16, 2026 |
+6.0% | +5.8% | +17.9% | +25.2% | +25.0% | +59.2% |
| Best one week Apr 13, 2026 |
-0.4% | +11.6% | +4.6% | +12.0% | +27.0% | +50.1% |
| Best one month Apr 28, 2026 |
-0.3% | -5.4% | +31.5% | +2.5% | +52.8% | +78.6% |
| Best 3 months Mar 30, 2026 |
-2.9% | -5.3% | -17.5% | +8.2% | +13.6% | +39.8% |
| Best 6 months Dec 24, 2025 |
+0.4% | 0.0% | +7.5% | +7.0% | +1.4% | +24.7% |
| Best one year Oct 2, 2025 |
-1.6% | -2.1% | +10.1% | -7.3% | +15.3% | -6.5% |
Trailing gains over each window, today and on the day each best window started, to compare today's setup with the best entries.