What is a Short Put?

Short Put is a strategy where you sell a Put option, betting the underlying asset’s price will stay the same or rise.
A put option:

• You receive a premium upfront
• You are obligated to buy the asset at the strike price if the buyer chooses to exercise the option

Potential outcomes of a Short Put strategy:

• Maximum profit: Premium received.
  (If the price stays above the strike price, you keep the premium because the buyer won't exercise the option)
• Main risk: Large but limited loss, maximum until the asset price falls to zero.
  (If the asset price falls sharply, you may be forced to buy at a much higher price)