Hedging Guide: Use Put Options to Protect Your Shares / 对冲指南：用看跌期权给你的股票上一道保险

A step-by-step tutorial for: how to buy puts before risky times, which contracts to choose, what they cost, and when to skip the insurance entirely / 一步一步教你如何在风险时期到来之前买入看跌期权，选择哪些合约，成本是多少，以及何时可以完全放弃保险。