| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | ZH | SPY | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 · ytd | +14.9% | −11.9% | −14.5% | +12.7% | −7.8% | +6.1% | +6.7% | — | — | — | — | — | +1.8% | +7.5% | −5.7pp |
| 2025 | −1.4% | +46.4% | −16.4% | −9.6% | −1.0% | +4.2% | +6.3% | +13.5% | +5.6% | −14.2% | −15.2% | −11.1% | −7.3% | +17.7% | −25.1pp |
| 2024 | −16.8% | +2.5% | −14.4% | −0.7% | −19.8% | −16.3% | +20.9% | +0.3% | +16.3% | −7.3% | +0.6% | −1.4% | −36.9% | +24.9% | −61.8pp |
| 2023 | +25.4% | −12.3% | −11.2% | −13.4% | −9.1% | +13.0% | +9.7% | −18.5% | +3.0% | −4.7% | −26.0% | +27.7% | −28.0% | +26.2% | −54.1pp |
| 2022 | — | — | — | — | — | — | — | — | — | −88.4% | +7.2% | +22.6% | −84.8% | −18.2% | −66.6pp |
| 2021 · part | — | — | — | +5.5% | — | — | — | — | — | — | — | — | +5.5% | +28.7% | −23.2pp |
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. ZH 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.
