A put option gives the right to sell at a set price, so it sets a floor under a position until it expires; the price of that floor is the premium. Options are the most precise hedge and usually the most expensive one to keep running.
- Protective put: own the shares, buy a put below today’s price. Losses below the strike are offset. See how protective puts work.
- Collar: buy a put and sell a call to pay for it. The floor is cheaper, but gains above the call strike are given up. See collar strategy.
- Put spread: buy one put and sell a lower one. Cheaper, but protection stops at the lower strike. See put spread.
Premiums rise when implied volatility is high, which is usually when people want protection most. Rolling puts year after year is a recurring drag on returns; see how much it costs to hedge with puts.
To size an index hedge, start from your portfolio’s beta. Illustrative: a $200,000 portfolio with a beta of 1.2 behaves roughly like $240,000 of S&P 500 exposure, so a hedge sized to $200,000 would cover only part of the expected move. See hedge ratio, beta-adjusted exposure and beta. Professional desks adjust hedges continuously; see delta hedging and tail-risk hedging.
Options carry their own risks: expiry, early assignment, wide bid-ask spreads and tax complications. They require options approval at a broker, and they are not suitable for every investor.