Every time you make a trade, someone else makes money. Not you – them. The broker, the market maker, the tax authority, and a dozen invisible middlemen all take a slice before you see a penny of return. And the cruel part is that most of these costs do not show up on any statement you will ever read. They are baked into the price, hidden in the spread, deferred to tax season, or buried in opportunity cost you never even calculated. If you are an active trader and you think your main problem is picking the wrong stocks, I have news: your main problem might be that you are trading at all.