The Magic Formula beat the Indian market. That's the least interesting thing about it.

Ten years ago you put ₹10 lakh into the thirty stocks the Magic Formula picks and rebuilt the list once a year, exactly as the book says. Today it's worth about ₹40 lakh. The same money in a plain Nifty 500 index fund would be around ₹37 lakh. So the formula worked: roughly 14.8% a year against the market's 13.9%. If that's all you wanted to know, you can close the tab.

But those smooth lines are the most reassuring thing in this whole analysis, and reassurance is exactly the problem. There's a clue already hiding in the chart. See the orange line, the one that lagged everything? That's the best ten stocks the formula could find. Hold that thought; we'll come back to it. First, the bigger blind spot.

The average nobody earned

You didn't invest for exactly ten years starting in June 2016. Nobody did. Real people start whenever the money shows up and hold for as long as their nerve lasts. So the honest question was never "what did the decade return." It's "what would I have gotten, starting when I actually started, holding as long as I actually held." Ask the backtest that, one bar for every start month, and the smooth 14.8% shatters.

Toggle the holding period, or just watch it cycle, and the panic drains out of the picture. That figure in the corner is the win rate: out of every 100 start dates, how many actually beat the index. Over one year outcomes ran from losing half your money to more than doubling it, and the formula beat the market in only 53 of 100 starts, barely better than a coin toss. Stretch to three years and the swings compress, yet the win rate slips to 45. By five years almost every start date made money, but it still edged the index in fewer than half. Read that carefully: holding longer made you calmer and richer, but it never made the formula reliably better than simply owning the market. Time did the work, not the stock picking.

The edge came with a bill

Go back to the first chart and watch the dips, not the climb. To collect that thin decade long edge you had to sit through a fall of about two thirds from the peak, nearly twice what the index gave up, then spend more than three years clawing back to even. Most investors don't survive that. They sell near the low, which means the people who earned the 14.8% are rarely the ones who lived through the middle of it.

Because a single line understates it. How deep you fell depended entirely on how you built the portfolio from the same formula. Concentrate into the book's handful of names and the hole got far deeper; spread the idea wider and it softened. This is the same strategy, four ways to hold it.

What it actually owned

Strip away the theory and a strategy is just the stocks it holds. Over the decade this one kept coming back to the same handful of names. Hindustan Zinc survived 87 of about 98 rebuilds, effectively a permanent holding. It leaned heavily into materials, metals and industrials, and it lived overwhelmingly in small and mid cap companies, not the household large caps most people picture when they think "quality."

A strategy is a claim, not a number

None of this makes the Magic Formula a bad idea, and this isn't a case against it. It's a case for one habit. Every strategy you inherit, whether from a book, a guru, or a confident friend, arrives as a single number and hides its range, its bill, its lumpiness, and the ordinary companies it actually owns. The only way to see them is to run the idea against real history, in the market you actually invest in. You've believed things for years. The freeing question is simply whether you ever checked.

So we took it to Krest, and ran it through the whole test.