Buy To Open A term used by many brokerages to represent the opening of a long position in option transactions. Investopedia Says: Investor can buy to open either (or a combination of) puts or calls, and thus will be holding the option(s) long. The distinguishing factor of a buy to open is that the option position is not held short in the account during the transaction. Related Terms: Buy Buy to Close Call Long Open Interest Option Put Sell to Close Sell to Open Short |