First, don't blame the overall environment of the A-share market, because most retail investors in the U.S. stock market also lose money. Second, look for problems within yourself—every trade you make is your own decision; no one is forcing you at gunpoint. ---So what exactly are the issues with retail investors? First, their middle school math skills are too poor. If most people were to take a middle school math exam now, they wouldn't even pass. They can't even handle basic arithmetic—how can they invest? Unfortunately, most retail investors never use math in their investments, and some don't even realize that investing requires math...