Daily % Change

Daily percent change is the difference between today’s closing price and yesterday’s closing price, expressed as a percentage. If a stock closed at $100 yesterday and $103 today, the daily change is +3%.

This is the most basic measure of "what happened today." A positive number means the stock went up; negative means it went down. The percentage matters more than the dollar amount — a $2 move on a $10 stock is a much bigger deal than a $2 move on a $500 stock.

Large single-day moves (say, more than 3–5% for a typical stock) usually have a reason behind them: earnings, analyst upgrades or downgrades, sector news, or broader market moves. Small daily changes are normal noise.