11.   An option gives the dealer access to its face value in cash in exchange for securities as collateral.

12.   An option gives the holder the right to buy or sell stock, at a specified price, by a specific date.

13.   An option gives the holder the right, though not the obligation to buy an option at a certain price.

14.   An option gives the owner the right to buy stock at a specific price, known as the strike.

15.   As counseling improves, though, and new treatment options are giving patients hope of controlling the virus for a lifetime, the risk is declining, she said.

16.   Bimonthly options give the holder the right, but not the obligation, to buy or sell a share at a given price.

17.   A call option gives a trader the right to buy shares of the underlying stock at a specified price and by a specified expiration date.

18.   A call option gives the buyer the right, but not the obligation, to buy a commodity at a price agreed to in advance.

19.   A currency option gives a purchaser the right -- but not the obligation -- to buy currency at a specific exchange rate on a future date.

20.   A call option gives an investor the right to buy shares of the underlying stock at a specified price and by a specified expiration date.