https://www.aniquant.com/blog/Articles on backtesting, strategy validation and quantitative trading, with our own data and no hype.en https://www.aniquant.com/blog/survivorship-bias-81-percent-stocks-2000https://www.aniquant.com/blog/survivorship-bias-81-percent-stocks-2000Sun, 11 Oct 2026 08:00:00 GMTWe tracked the 7,532 stocks listed on Wall Street on 3 January 2000. Only 1,436 are still around. Forget the rest, and your backtest looks three times better than reality.