Options based upon futures markets are priced according to their multiplier (or contract value), and options based upon stocks are priced in groups of 100 shares. For example, the ZI (Silver 5000 troy ounce) options market has a multiplier of 5000, so its premiums need to be multiplied by 5000 to reach their actual cash value, and the stock CSCO is priced for 100 shares, so its premiums need to be multiplied by 100 to reach their actual cash value.
