Yahoo Finance and The Bipartisan Policy Center on the budget and what may come on taxes, infrastructure, and more on 6/16 at 10 a.m. ET Every investor knows that the path toward profits lies in buying low and selling high. That’s a basic precept of any economic trading system. The trick, however, is recognizing when the stock is low enough to buy in. The prime moment to buy is when the stock hits bottom; that will maximize returns when the share price starts to rise again.