Mean reversion · daily rule · Financials
Bollinger Reversion on EQB
What the play says
EQB with the play, last two years
Shading shows the play's call from the close that triggered it.
Growth of C$10,000 since 2005
Log scale. After trading costs, with T-bill interest while out.
The record
The play against buying and holding EQB over exactly the same dates, after costs.
| Play, since 2005 | Hold, since 2005 | Play, 5 yrs | Hold, 5 yrs | |
|---|---|---|---|---|
| Annual return | +1.0% | +13.7% | +5.0% | +11.6% |
| Total return | +24% | +1,508% | +27% | +73% |
| Worst drawdown | −73.9% | −72.6% | −21.6% | −44.8% |
| Volatility | 20.9% | 32.6% | 16.9% | 29.6% |
| Sharpe ratio | 0.07 | 0.50 | 0.15 | 0.39 |
| Time invested | 23% | 100% | ||
| Switches per year | 8.2 | 0 |
Every call, graded
Right on 104 of 177 closed calls (59%). In calls averaged +0.4%; out calls saw EQB move +4.3% on average.
| Called | Call | Price | Until | EQB moved | Result |
|---|---|---|---|---|---|
| Aug 20, 2026 | IN | C$131.94 | now | −8.0% | open |
| May 25, 2026 | OUT | C$118.72 | Aug 20, 2026 | +11.1% | ✕ wrong |
| May 12, 2026 | IN | C$114.36 | May 25, 2026 | +3.8% | ✓ right |
| Mar 31, 2026 | OUT | C$110.37 | May 12, 2026 | +3.6% | ✕ wrong |
| Mar 11, 2026 | IN | C$111.40 | Mar 31, 2026 | −0.9% | ✕ wrong |
| Nov 26, 2025 | OUT | C$85.78 | Mar 11, 2026 | +29.9% | ✕ wrong |
| Nov 14, 2025 | IN | C$83.20 | Nov 26, 2025 | +3.1% | ✓ right |
| Nov 4, 2025 | OUT | C$88.26 | Nov 14, 2025 | −5.7% | ✓ right |
| Oct 16, 2025 | IN | C$88.50 | Nov 4, 2025 | −0.3% | ✕ wrong |
| Sep 23, 2025 | OUT | C$90.68 | Oct 16, 2025 | −2.4% | ✓ right |
| Aug 28, 2025 | IN | C$87.82 | Sep 23, 2025 | +3.3% | ✓ right |
| Jun 18, 2025 | OUT | C$90.61 | Aug 28, 2025 | −3.1% | ✓ right |
An in call is right when the price rose before the next call; an out call is right when it fell. The latest 12 of 178 calls shown.
How the play works
- In on a close below the lower band (20-day average − 2 standard deviations).
- Out on a close above the 20-day average.
This runs against Bollinger's advice that tags of the bands are not signals. It is shown because so many traders use it.
The case against
Valeriy Zakamulin tested moving-average timing on up to 155 years of U.S. stock data and found no statistically significant edge in the second half of that record. The rules earned their keep in a few severe bear markets and lagged buy and hold for long stretches in between.