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The Lab

Ideas traders use, put to the record

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#42 Survivorship: how the coins were picked, and what it does

Past prices; no real orders were placed. Every figure is a share of the money, or a count.
Last checked: 15 October 2026.

Where the idea comes from

The short version

How we tested

The maths, step by step

1. One quarter, July to September 2026.

2. Why. Trading follows price. A coin that doubles in a quarter draws a crowd, so it is near the top of the list at the end. A coin that halved has lost its crowd, so it drops off. Picking at the end keeps the first and drops the second.

3. Every quarter. The list picked at the end did better than the list picked at the start: its average coin in all 23 quarters, its median coin in 21. The median coin's gap was 15 points in a typical quarter. Over a calendar year, it was larger: the end list's median coin did better by 126 points on average.

4. Dying is the smaller part. No coin in either list stopped trading inside a quarter. Over a year, two coins in the start lists stopped. Over 90 days the bias comes from picking the coins that rose, not from leaving out the dead ones.

What it means for each page

The Lab's live studies, 1 to 11 (the 32 coins, last 90 days).

A long-side result there is likely too good, and a short-side result too bad.

These coins were busy and growing, so their funding and leverage ran hotter than a fair list's would.

Write-ups re-run with the dead coins put back:

Write-ups with a hindsight list, not re-run:

Not affected:

Limits

Credits

← How far to trust a Sharpe ratioHidden order: the BDS test →

Educational research from public market data; any trading discussed is paper, never real. Nothing here is advice. The full notice.