To: Dave Chanoux who wrote (11632 ) 3/26/1998 12:54:00 PM From: Spots Respond to of 12298
>>What do you mean by a closing transaction? An opening transaction occurs when you enter a position (short or long) on an option. A closing transaction simply means you exit a previously held position by executing the reverse, or closing, transaction. If you hold no APM puts and you buy 10 Apr 10s, you have executed an opening transaction. When you sell them, that is a closing transaction. Exercising is also closing. >>If someone is selling puts, doesn't it follow that someone else is buying them? Sure, but it doesn't follow that the outstanding interest is increased or decreased. It depends on whether or not the seller and buyer are executing opening or closing transactions. If they're both closing, OI decreases; if they're both opening, OI increases; if one is opening and one is closing, OI remains the same. Say that with no APM position at all I offer to sell 10 APM APR 10 puts, and you, also with no position, buy my 10 puts. We've both made opening transactions; I'm short, you're long. I (we) have just created 10 option contracts that didn't exist before. OI increases by 10. Later, it happens, you decide to close your winning position and I decide to eat my losses. You offer to sell your 10 long puts (a closing transaction) and I buy them to cover my 10 short (another closing transaction). The 10 contracts now cease to exist; OI decreases by 10. Ok, suppose you decide to sell your winning puts (closing), but I say *&^%&^*, I'm just going to hang on and lose a bit more before supper. However, someone else buys your 10 puts who didn't own any (an opening transaction). In that case a transfer of an existing contract occurs (in effect), and OI stays the same. >> buy shares and sell puts to hedge if you expect a rise - is this something someone would do? Someone might do anything, but in effect selling puts is the same as buying shares and then writing a call on those shares (a covered call). You might buy stock AND sell (write) puts on the same stock (by that I mean the same security, you can't WRITE a put on the actual shares you bought) if you wanted to own twice the shares than you were willing to put up cash or margin loan to cover. You could write an in-the-money put which moves like the stock up to the put's strike price. Not a hedge; a leveraging device.