• A call can refer to either a call auction or a call option.

  • A call option gives the buyer the right, but not the obligation, to purchase the underlying instrument at a given strike price within a given period of time.
  • Call options are commonly used to speculate on an up move, hedge or write covered calls.
  • A call auction is a type of bidding in which prices are determined by bidding for a specific time and period.
  • An auction call is a trading method used in illiquid markets to determine the price of securities.