| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | MAR.LS | SPY | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 · ytd | −3.9% | +0.4% | −0.4% | +2.9% | −8.7% | +1.3% | +1.7% | — | — | — | — | — | −7.1% | +7.5% | −14.6pp |
| 2025 | +0.3% | +2.3% | +5.0% | −3.5% | +16.8% | +3.8% | −1.8% | +8.8% | −3.4% | +10.1% | −4.4% | +6.7% | +46.1% | +17.7% | +28.4pp |
| 2024 | +4.6% | +0.0% | +0.9% | −1.2% | +10.0% | −10.0% | +0.6% | +1.9% | +9.9% | −1.1% | −4.5% | +3.9% | +14.1% | +24.9% | −10.8pp |
| 2023 | −2.9% | −0.4% | −1.3% | +4.4% | −7.6% | +19.5% | −3.4% | +3.9% | −5.7% | +4.4% | −2.3% | +20.5% | +28.0% | +26.2% | +1.9pp |
| 2022 | +56.5% | −1.5% | +3.0% | −5.5% | +1.2% | +3.1% | −3.7% | −3.1% | −28.0% | −6.4% | +41.9% | +0.0% | +39.6% | −18.2% | +57.8pp |
| 2021 | −0.3% | −1.0% | +14.3% | −8.9% | +14.7% | +30.9% | −11.3% | +31.1% | +13.7% | +4.3% | −0.5% | +3.6% | +119.5% | +28.7% | +90.8pp |
| 2020 | +5.5% | −4.7% | −13.4% | +17.0% | −2.1% | +0.3% | +20.6% | −1.3% | −14.0% | −3.4% | +9.9% | −5.3% | +2.9% | +18.3% | −15.4pp |
| 2019 | +14.2% | −0.4% | +0.0% | +5.1% | −10.7% | −1.1% | −2.9% | −0.7% | −5.0% | −3.8% | −5.5% | +0.3% | −11.9% | +31.2% | −43.1pp |
| 2018 | +18.1% | −3.9% | −8.9% | +7.1% | −3.3% | +2.6% | +14.5% | +21.7% | −15.4% | +15.9% | +5.5% | −16.7% | +31.9% | −4.6% | +36.5pp |
| 2017 | +3.4% | +0.0% | +32.4% | +16.3% | +0.0% | +26.3% | +3.9% | −1.6% | +0.0% | +12.8% | −8.9% | −13.8% | +82.1% | +21.7% | +60.4pp |
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. MAR.LS is on the price only (split-adjusted close; dividends NOT included) basis, SPY on the total return (splits + dividends) basis. THE TWO DIFFER: one series includes dividends and the other does not, so the Δ column flatters whichever one is on the total-return basis. Read it with that in mind — the bases are printed rather than silently reconciled.
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.
