Depending on how old you are, buy stocks that are riskier/safer. If you're in your 20s or early 30s a loss like that is no big deal. You've got years to make it back. Pick stocks that are a wee riskier and have potential to give higher returns. As you pass your 30s tho, you want to go more towards the safer slow movers like VOO or SPY etc. Etfs with lower risk so you don't have to worry about your retirement as much and you can switch the riskier gainers into safer slow movers