Twelve tickers held for the same share of the decade returned 45 to 3300 percent

ROST spent 88.7475 percent of the ten-year window in a position under 52 week high momentum. So did NVDA. Same strategy, same universe, same study, the exact same share of the decade with capital committed. ROST returned 45.18 percent over that stretch. NVDA returned 3300.42 percent, more than seventy times as much, for the identical amount of time in the market.

Twelve tickers in this study share that exact 88.7475 percent exposure figure, not a rounded match, the same number to four decimal places. Every one of them entered a position early in the window and held it, without an exit signal firing, until the study's end date. The share of the calendar spent in the trade was fixed by how the strategy is built, one entry, no signal to leave, hold to the end. What varied entirely was what the position did while it was open.

What exposure time actually measures here

Exposure time is the share of the backtest window a ticker held an open position, not a measure of how well that position performed. For a strategy like this one, buy on a new 52 week high and hold until the rule says otherwise, a ticker that never triggers an exit spends the rest of the window sitting in the trade by default. That is a fact about when the strategy chose to enter and whether anything later made it sell, not a fact about the size of the move underneath. CSCO, in this same group of twelve, made two trades rather than one and still landed on the identical 88.7475 percent, because the total time across both positions summed to the same share of the window as everyone else's single, unbroken hold.

Tenachine's guide on this study's headline return already covers NVDA's own 3300.42 percent trade in detail, including this same 88.7475 percent exposure figure taken on its own. What that guide did not do is put NVDA next to the eleven other tickers that spent the identical share of the window in a position and returned as little as 45.18 percent. Read alone, NVDA's exposure time looks like part of the explanation for its return, a long hold let a long trend compound. Read next to ROST's, held for the same length of time for a return fifteen times smaller, the exposure figure stops explaining anything about magnitude at all.

The number this does not replace

None of this says time in the market is meaningless. A strategy with near-zero exposure time cannot compound a winning position for long even if the underlying stock goes on to do something remarkable later, and a strategy that exits too early is a different failure mode than a strategy that never exits. What this group of twelve shows is narrower: once a position is already open for a comparable stretch of time, the exposure figure alone cannot tell you whether that stretch was 45 percent good or 3300 percent good. Tenachine's guide on reading a return distribution makes a related point about the study's own average return, 94.33 percent, sitting well above its median of 48.05 percent for the same underlying reason, a handful of positions doing most of the work. Exposure time is one more figure on the same study page that looks like it should predict the outcome and, checked against twelve real tickers held for the identical length of time, does not.

This is not a claim that holding longer causes a bigger return, or that any of these twelve tickers will repeat this pattern going forward. Past performance does not predict future results, and this study's own 57.3 percent failure rate, covered in a separate guide, already limits how much weight the surviving 94 tickers can carry on their own. What the exposure time figure does is answer one specific, narrower question, how much of the window a position was open, and it answers that question well. It was never built to answer how much that position made, and this group of twelve, all at 88.7475 percent, is the clearest evidence on this site that the two questions need two separate numbers.