Backtested and hypothetical results, shown for educational purposes only — not investment advice. Past performance does not indicate future results.
BI BIV — Stretched, weak edge$74.06 · 2026-09-11
BIV shows only a faint, unreliable daily reversal bias.
Current stretch: RSI(2) at 1 is deep oversold, 5 down days in a row, -3.0σ below the 50-day average — but the daily edge here is thin.
| Rule | Days held | Avg / day | Win rate | Total | CAGR | Sharpe | Max DD |
|---|---|---|---|---|---|---|---|
| ■ After a DOWN close | 2,235 (46%) | +0.020% | 53.4% | +52% | +2.2% | 0.54 | -14.8% |
| ■ After an UP close | 2,564 (52%) | +0.010% | 51.6% | +27% | +1.2% | 0.32 | -15.3% |
| ■ Bottom 10% RSI(2) | 489 (10%) | +0.033% | 54.8% | +17% | +0.8% | 0.35 | -8.6% |
| ■ Top 10% RSI(2) | 489 (10%) | -0.010% | 46.6% | -5% | -0.3% | -0.15 | -7.5% |
How to read this ▾
Some assets mean-revert at short horizons (a sharp move tends to partly reverse); others trend (a move tends to continue). At the daily close-to-close horizon the reversal shows up cleanly and consistently in the broad equity indices and mostly breaks down elsewhere — commodities, crypto, and individual stocks carry their own momentum. The names above are the ones where it holds up.
RSI(2) is a 2-day momentum oscillator — below ~10 is short-term oversold, above ~90 overbought. Distance from the 50-day average is measured in standard deviations (z-score). Streak counts consecutive up or down closes. For each, we show what happened over the next 1–5 days, historically.
The strategy table pairs each dip-buy rule against its opposite — day-after-a-down-close vs day-after-an-up-close, and the bottom vs top RSI(2) decile. Both legs of a pair are held one day and trade a similar number of days, so raw returns compare fairly (unlike buy & hold, which wins on total return simply by always being invested). Avg / day — mean return on the days the rule is in the market — is the cleanest apples-to-apples number. Frictionless: no commissions or slippage. A character test, not a tradeable system. Past behaviour is not a forecast.