If you’ve ever bought a car or gone to a yard sale, you already understand bid vs ask prices at a basic level. If someone wants to sell a used car for $1,000 and you want to buy it for $900, the $100 ...

It is the difference between buy/bid price (which a buyer is ready to pay) and ask/sell price (which a seller is ready to sell on) of any commodity particular future contract. A trade is exercised for ...