| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | COPP | SPY | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 · ytd | +14.9% | +9.9% | −18.7% | +4.4% | +13.7% | −9.6% | −1.8% | — | — | — | — | — | +8.1% | +7.5% | +0.5pp |
| 2025 | −3.0% | −1.3% | +0.2% | −2.2% | +8.8% | +10.5% | −6.1% | +11.9% | +16.3% | +2.9% | +6.1% | +15.5% | +74.0% | +17.7% | +56.3pp |
| 2024 · part | — | — | — | +8.3% | +5.8% | −6.1% | −3.1% | −1.4% | +8.4% | −8.0% | −2.6% | −9.9% | −10.0% | +24.9% | −34.9pp |
A month’s return is its month-end close over the prior month-end’s, so a year’s figure is exactly the product of its twelve monthly cells — no separate annualisation, no resampling. A blank cell means no return exists for that month (the series had not started, or it is the very first month-end, which has nothing to be measured against). Blank is never zero.
Basis. COPP is on the total return (splits + dividends) basis, SPY on the total return (splits + dividends) basis. Both columns are on the same basis, so the Δ column is a like-for-like difference.
Partial years. A year marked “ytd” or “part” does not cover the full calendar year: either the stored history starts inside it (the figure is measured from the first month-end present) or the data stops before December (the figure runs through the last stored close). The row’s own tooltip names the exact boundary. It is never dressed up as a calendar-year return.
End of day. These are stored end-of-day closes, and the window is anchored on the LAST stored bar rather than today’s date — so the newest row ends where the data ends. Nothing here is intraday.
