Standard Lot Size

the seemingly-arbitrary number of shares a trader typically buys or sells in a single, high-conviction trade, but is actually based on a combination of [a] stock price; [b] account size and [c] tolerance for risk. It could be said that there’s an unwritten industry benchmark of 100 shares as a standard lot size, but every trader determines their own standard lot size, and not only adjusts their own default over time as conditions change, but also incrementally with each entry scenario.