Market Order. The market order is the simplest and quickest way to get your order filled (or completed). A market order instructs your broker to buy or sell the stock immediately at the prevailing price, whatever that may be. If you are following the market, you may or may not get the last price listed. A market order to buy or sell goes to the top of all pending orders and gets executed almost immediately, regardless of price. Pending orders for a stock during the trading day get arranged by price. Pending orders for a stock during the trading day get arranged by price. The pre-determined price the put option buyer can sell at is called the strike price. Put options are traded on various underlying assets, including stocks, currencies, bonds, commodities, futures,