Volume & money flow · daily rule · Industrials & materials
Money Flow Index on Fastenal
FAST 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 $10,000 since 2005
Log scale. After trading costs, with T-bill interest while out.
The record
The play against buying and holding FAST over exactly the same dates, after costs.
| Play, since 2005 | Hold, since 2005 | Play, 5 yrs | Hold, 5 yrs | |
|---|---|---|---|---|
| Annual return | +17.2% | +15.3% | +13.8% | +16.8% |
| Total return | +3,074% | +2,113% | +90% | +116% |
| Worst drawdown | −36.3% | −52.0% | −15.7% | −30.7% |
| Volatility | 21.0% | 29.8% | 16.5% | 24.6% |
| Sharpe ratio | 0.78 | 0.57 | 0.63 | 0.60 |
| Time invested | 43% | 100% | ||
| Switches per year | 2.5 | 0 |
Every call, graded
Right on 37 of 54 closed calls (69%). In calls averaged +13.6%; out calls saw FAST move +0.2% on average.
| Called | Call | Price | Until | FAST moved | Result |
|---|---|---|---|---|---|
| Aug 12, 2026 | OUT | $52.22 | now | −1.5% | open |
| Oct 24, 2025 | IN | $41.96 | Aug 12, 2026 | +24.5% | ✓ right |
| Jul 29, 2025 | OUT | $45.61 | Oct 24, 2025 | −8.0% | ✓ right |
| Apr 29, 2024 | IN | $32.63 | Jul 29, 2025 | +39.8% | ✓ right |
| Mar 23, 2022 | OUT | $25.56 | Apr 29, 2024 | +27.6% | ✕ wrong |
| Jan 19, 2022 | IN | $25.85 | Mar 23, 2022 | −1.1% | ✕ wrong |
| Jul 13, 2021 | OUT | $23.44 | Jan 19, 2022 | +10.3% | ✕ wrong |
| Jun 21, 2021 | IN | $22.69 | Jul 13, 2021 | +3.3% | ✓ right |
| Aug 4, 2020 | OUT | $20.44 | Jun 21, 2021 | +11.0% | ✕ wrong |
| Jun 29, 2020 | IN | $17.93 | Aug 4, 2020 | +14.0% | ✓ right |
| Oct 24, 2019 | OUT | $15.68 | Jun 29, 2020 | +14.3% | ✕ wrong |
| May 21, 2019 | IN | $13.53 | Oct 24, 2019 | +15.9% | ✓ 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 55 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.