#derivative_instrument__derivative  a financial instrument whose value is based on another security
  supertype:  #legal_document__legaldocument__legal_instrument__legalinstrument__officialdocument__instrument  a document that states some contractual relationship or grants some right
  subtype:  #futures_contract__futurescontract  an agreement to buy or sell a specific amount of a commodity or financial instrument at a particular price on a stipulated future date; the contract can be sold before the settlement date
     subtype:  #stock-index_futures__stockindexfuture  a futures contract based on a stock index; a bet on the future price of the indexed group of stocks
  subtype:  #option  the right to buy or sell property at an agreed price; the right is purchased and if it is not exercised by a stated date the money is forfeited
     subtype:  #naked_option__nakedoption  a put or call option for which the seller or buyer has no underlying security position
     subtype:  #covered_option__coveredoption  a put or call option backed by the shares underlying the option
     subtype:  #call_option.option__calloption__call  the option to buy a given stock (or stock index or commodity future) at a given price before a given date
     subtype:  #put__put_option__putoption  the option to sell a given stock (or stock index or commodity future) at a given price before a given date
     subtype:  #straddle.option  the option to buy or sell a given stock (or stock index or commodity future) at a given price before a given date; consists of an equal number of put and call options
     subtype:  #incentive_option__incentiveoption__incentive_stock_option__incentivestockoption  an option granted to corporate executives if the company achieves certain financial goals
     subtype:  #stock_option__stockoption  the right to buy or sell a stock at a specified price within a stated period
        subtype:  #call_option  an option to buy
        subtype:  #put_option__putoption  an option to sell
     subtype:  #lock-up_option  an option to buy the crown jewels offered to a white knight in order to forestall a hostile takeover

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