Volume & money flow · daily rule · Consumer & retail
Money Flow Index on Boyd Group
BYD with the play, last two years
Shading shows the play's call from the close that triggered it.
Money Flow Index (14)
Dashed lines at 20, 80.
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 BYD over exactly the same dates, after costs.
| Play, since 2005 | Hold, since 2005 | Play, 5 yrs | Hold, 5 yrs | |
|---|---|---|---|---|
| Annual return | +2.5% | +16.7% | −11.4% | −14.7% |
| Total return | +70% | +2,740% | −45% | −55% |
| Worst drawdown | −84.7% | −87.0% | −53.1% | −65.6% |
| Volatility | 31.1% | 39.0% | 25.2% | 32.7% |
| Sharpe ratio | 0.18 | 0.55 | −0.51 | −0.44 |
| Time invested | 47% | 100% | ||
| Switches per year | 2.6 | 0 |
Every call, graded
Right on 30 of 56 closed calls (54%). In calls averaged +7.5%; out calls saw BYD move +14.3% on average.
| Called | Call | Price | Until | BYD moved | Result |
|---|---|---|---|---|---|
| Mar 20, 2026 | IN | C$191.46 | now | −40.6% | open |
| Nov 4, 2025 | OUT | C$222.57 | Mar 20, 2026 | −14.0% | ✓ right |
| Mar 27, 2025 | IN | C$214.20 | Nov 4, 2025 | +3.9% | ✓ right |
| Jan 6, 2025 | OUT | C$213.01 | Mar 27, 2025 | +0.6% | ✕ wrong |
| Dec 12, 2024 | IN | C$204.86 | Jan 6, 2025 | +4.0% | ✓ right |
| Jun 17, 2024 | OUT | C$256.66 | Dec 12, 2024 | −20.2% | ✓ right |
| Apr 30, 2024 | IN | C$255.30 | Jun 17, 2024 | +0.5% | ✓ right |
| Jan 31, 2024 | OUT | C$286.44 | Apr 30, 2024 | −10.9% | ✓ right |
| Oct 10, 2023 | IN | C$240.32 | Jan 31, 2024 | +19.2% | ✓ right |
| Aug 5, 2022 | OUT | C$160.08 | Oct 10, 2023 | +50.1% | ✕ wrong |
| May 21, 2021 | IN | C$204.72 | Aug 5, 2022 | −21.8% | ✕ wrong |
| Mar 24, 2021 | OUT | C$221.93 | May 21, 2021 | −7.8% | ✓ 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 57 calls shown.
How the play works
- In when the 14-day MFI crosses up through 20.
- Out when it crosses down through 80.
The creators also stress divergences, which this rule ignores.
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.