| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | ISOFOL.ST | SPY | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 · ytd | −8.3% | +6.2% | −8.5% | +3.7% | +5.3% | +3.7% | +7.3% | — | — | — | — | — | +8.4% | +7.5% | +0.8pp |
| 2025 | −1.8% | −24.7% | +9.7% | +2.7% | −43.8% | −5.7% | −7.5% | −6.9% | −5.2% | −13.8% | +11.6% | −5.3% | −67.2% | +17.7% | −84.9pp |
| 2024 | −12.6% | −8.2% | +31.7% | −5.6% | −1.6% | −3.8% | +313.0% | +1.8% | −5.2% | +37.5% | −20.9% | −25.8% | +204.1% | +24.9% | +179.2pp |
| 2023 | +10.4% | −17.0% | −9.7% | +6.7% | −20.4% | −2.1% | +31.2% | +2.8% | +23.3% | −8.1% | +2.8% | −8.8% | −1.4% | +26.2% | −27.5pp |
| 2022 | — | — | — | −6.8% | +5.7% | −13.0% | +0.9% | −85.1% | −41.1% | −4.7% | −11.2% | +25.0% | −92.0% | −18.2% | −73.8pp |
| 2021 | −10.7% | +11.2% | −29.9% | −32.3% | −19.5% | +9.3% | +4.5% | −2.8% | −1.0% | −7.5% | +66.0% | −34.8% | −58.3% | +28.7% | −87.0pp |
| 2020 | −11.4% | −6.4% | −64.2% | +32.7% | +21.7% | −12.4% | +135.2% | +1.0% | +25.2% | −20.4% | +15.9% | +67.2% | +92.9% | +18.3% | +74.6pp |
| 2019 | +6.7% | −3.9% | +4.5% | −6.6% | −7.1% | +1.4% | +19.1% | −13.1% | −8.6% | +1.4% | −3.2% | −3.3% | −15.5% | +31.2% | −46.7pp |
| 2018 | +24.7% | −6.6% | −5.9% | +10.0% | −17.0% | +2.7% | +6.2% | +9.6% | +11.1% | −10.7% | −5.0% | −3.2% | +9.1% | −4.6% | +13.7pp |
| 2017 · part | — | — | — | — | +6.9% | −6.0% | −4.7% | −4.5% | −0.5% | +10.9% | −2.6% | −3.9% | −5.6% | +21.7% | −27.3pp |
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. ISOFOL.ST 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.
