Investing Strategies What is the 90% rule in stocks? March 11, 2026 by pups | Leave a Comment The 90% rule in stocks is a market timing strategy that suggests selling 90% of your stock holdings when the market’s advance-decline line (A/D line) falls below its 10-month moving average. This rule aims to help investors avoid significant market downturns. Understanding the 90% Rule in Stock Investing The 90% rule, also known as the […] Read more »