Insuring a portfolio? A simple but expensive way is to Buy a Put. You could do a straddle where you Buy a Put and Sell a Put further out of the money so the cost of Buying the Put is less. 2nd way is selling and taking some profits. You’ll pay some taxes but it doesn’t cost you any money. 3rd way, which he prefers, is going long S&P 500 VIX Short-Term (VXX-N). If the market corrects it will go up. He goes long this and Shorts a Call Option against it to take an option premium.