| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | ALTR.LS | SPY | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 · ytd | −3.8% | +11.5% | +1.3% | +1.9% | −0.7% | −4.1% | +1.1% | — | — | — | — | — | +6.7% | +7.5% | −0.9pp |
| 2025 | +8.1% | +5.1% | −1.4% | +1.7% | −12.6% | −7.5% | −2.6% | +5.2% | −0.4% | −1.8% | −7.3% | −1.3% | −15.6% | +17.7% | −33.3pp |
| 2024 | −1.7% | −0.2% | +16.0% | −1.1% | −2.7% | +7.0% | −6.7% | −2.2% | +2.1% | −0.9% | +0.1% | +7.0% | +15.9% | +24.9% | −9.0pp |
| 2023 | −7.5% | +0.2% | +2.3% | −1.2% | +3.7% | +0.9% | +3.9% | +5.1% | −5.8% | +6.6% | +4.2% | −3.4% | +8.3% | +26.2% | −17.9pp |
| 2022 | — | — | — | — | +45.1% | +5.1% | −9.6% | −2.3% | −8.1% | +8.9% | −1.2% | −10.1% | +19.9% | −18.2% | +38.0pp |
| 2021 | −4.7% | +23.0% | +7.9% | −0.4% | −11.9% | −8.5% | −2.8% | +10.7% | −5.1% | +4.6% | −12.5% | +14.5% | +8.7% | +28.7% | −20.0pp |
| 2020 | −1.8% | −12.9% | −25.5% | +33.1% | −14.1% | +3.1% | −1.7% | −0.2% | −10.5% | −11.5% | +36.0% | +14.5% | −9.2% | +18.3% | −27.5pp |
| 2019 | +24.7% | −0.7% | −2.8% | +0.1% | −13.1% | +0.6% | −2.5% | −3.4% | +6.0% | −10.3% | +3.4% | +0.5% | −2.1% | +31.2% | −33.3pp |
| 2018 | — | −9.6% | +15.9% | +10.5% | +31.9% | +9.5% | +1.2% | −9.0% | +3.8% | −6.2% | −17.2% | −9.7% | +12.2% | −4.6% | +16.7pp |
| 2017 | +5.0% | +6.1% | −2.6% | +2.3% | +1.3% | −7.0% | −4.9% | −4.4% | +21.7% | +22.8% | −5.2% | −0.6% | +33.8% | +21.7% | +12.1pp |
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. ALTR.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.
