An iron condor sells an out-of-the-money put spread and an out-of-the-money call spread at the same time. You collect two credits and win if the stock expires between the two short strikes. Losses are capped by the long wings.
It is a theta and short-vega trade that suits high iv-rank and range-bound expectations. The risk is a large move through either wing.
Example: stock at $100. Sell the $90 put / buy the $85 put, and sell the $110 call / buy the $115 call, collecting $1.80 total. Max profit $180 if the stock stays between $90 and $110; max loss $5 - $1.80 = $3.20 ($320).
Related: credit-spread, vertical-spread, strangle, iv-rank, theta