Mean reversion · daily rule · Industrials & materials
Bollinger Reversion on Brookfield Business Corp
What the play says
BBUC with the play, last two years
Shading shows the play's call from the close that triggered it.
Growth of C$10,000 since 2022
Log scale. After trading costs, with T-bill interest while out.
The record
The play against buying and holding BBUC over exactly the same dates, after costs.
| Play, since 2022 | Hold, since 2022 | Play, 5 yrs | Hold, 5 yrs | |
|---|---|---|---|---|
| Annual return | +21.9% | 0.0% | +21.9% | 0.0% |
| Total return | +144% | 0% | +144% | 0% |
| Worst drawdown | −17.4% | −49.9% | −17.4% | −49.9% |
| Volatility | 21.0% | 39.8% | 21.0% | 39.8% |
| Sharpe ratio | 0.85 | 0.09 | 0.85 | 0.09 |
| Time invested | 26% | 100% | ||
| Switches per year | 10.2 | 0 |
Every call, graded
Right on 33 of 46 closed calls (72%). In calls averaged +3.6%; out calls saw BBUC move −3.1% on average.
| Called | Call | Price | Until | BBUC moved | Result |
|---|---|---|---|---|---|
| Oct 2, 2026 | OUT | C$36.47 | now | +4.0% | open |
| Aug 6, 2026 | IN | C$41.48 | Oct 2, 2026 | −12.1% | ✕ wrong |
| Jul 6, 2026 | OUT | C$44.92 | Aug 6, 2026 | −7.7% | ✓ right |
| Jun 29, 2026 | IN | C$41.64 | Jul 6, 2026 | +7.9% | ✓ right |
| May 21, 2026 | OUT | C$46.50 | Jun 29, 2026 | −10.5% | ✓ right |
| May 8, 2026 | IN | C$42.01 | May 21, 2026 | +10.7% | ✓ right |
| Mar 25, 2026 | OUT | C$44.91 | May 8, 2026 | −6.5% | ✓ right |
| Feb 13, 2026 | IN | C$46.09 | Mar 25, 2026 | −2.6% | ✕ wrong |
| Jan 15, 2026 | OUT | C$50.76 | Feb 13, 2026 | −9.2% | ✓ right |
| Jan 7, 2026 | IN | C$46.98 | Jan 15, 2026 | +8.1% | ✓ right |
| Nov 25, 2025 | OUT | C$47.34 | Jan 7, 2026 | −0.8% | ✓ right |
| Nov 7, 2025 | IN | C$43.50 | Nov 25, 2025 | +8.8% | ✓ 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 47 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.