| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | BNTX | SPY | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 · ytd | +19.5% | −3.1% | −19.4% | +16.4% | −7.2% | −3.0% | −0.1% | — | — | — | — | — | −2.4% | +7.5% | −9.9pp |
| 2025 | +8.6% | −8.8% | −19.4% | +14.4% | −8.0% | +11.1% | +1.0% | −7.0% | −1.4% | +5.4% | −0.7% | −7.7% | −16.5% | +17.7% | −34.2pp |
| 2024 | −9.9% | −6.4% | +3.7% | −3.7% | +13.3% | −20.1% | +7.3% | +2.3% | +34.6% | −4.8% | +4.7% | −3.8% | +8.0% | +24.9% | −16.9pp |
| 2023 | −4.5% | −9.3% | −4.2% | −8.3% | −8.0% | +2.7% | +0.9% | +11.1% | −10.2% | −13.9% | +7.3% | +5.1% | −29.7% | +26.2% | −55.9pp |
| 2022 | −33.3% | −12.4% | +13.1% | −18.6% | +17.7% | −6.6% | +10.8% | −12.4% | −6.7% | +2.0% | +21.3% | −10.1% | −40.4% | −18.2% | −22.2pp |
| 2021 | +43.4% | −6.8% | +0.1% | +72.4% | +8.3% | +9.7% | +46.7% | +0.3% | −17.1% | +2.1% | +26.2% | −26.7% | +216.2% | +28.7% | +187.5pp |
| 2020 | −13.8% | +20.2% | +66.4% | −18.7% | +4.3% | +34.7% | +23.0% | −25.4% | +13.0% | +23.3% | +45.5% | −34.4% | +140.6% | +18.3% | +122.3pp |
| 2019 · part | — | — | — | — | — | — | — | — | — | — | +30.7% | +54.1% | +101.4% | +31.2% | +70.2pp |
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. BNTX 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.
