These are puts, you buy them, they have a fixed expiration date at which point they will be worthless if the price is above the strike price.
Fixed down side, upside is $100 per contract per dollar the stock is below the strike at expiry. You can also sell them before then, and price depends on time to expiry, volatility, and distance to the strike price. See Black-Scholes model for more info.
Fixed down side, upside is $100 per contract per dollar the stock is below the strike at expiry. You can also sell them before then, and price depends on time to expiry, volatility, and distance to the strike price. See Black-Scholes model for more info.