Originally posted by MACD_addy
In order to get short on a downtick your offer has to reflect the inside quote.
I am not sure you meant this how it sounds but this is not necessarily true. I'll use Vinny's other thread on ISLD hidden orders as an example.
Stock is bid at 40.00 and offered at 40.02 and the 40.00 bid is a down bid. If I offer the stock out to short at 40.01 using an ISLD hidden order, the NAZ inside market stays at 40.02. If an ISLD buyer takes the offer, he will get matched to my hidden offer at 40.01 and get price improvement and I will execute a valid short, but my offer never was reflected at the inside market.
Vinny the rule FWIW is simply that if the bid is a down bid, you must sell the stock (short) at at least once cent above the inside (down) bid. BUt also notice that I said "not according to the rules". I know for a fact that many platforms will not police against a shaved offer. EG the stock is 40.00 by 40.01 on a down bid and you offer it out at 40.009 (40.01 minus .001). THis is rounded for display purposes at 40.01 and lumped in with the other shares at the offer and on some platforms will go live as a valid order.
WHen a bidder takes the offer and gets matched with the 40.009, technically it was a short sale at .009 above the bid-just under the one cent minimum required. Nonetheless it works and I have never heard of anyone getting "busted" for it.
On a side note, this applies for sure to "higher priced" stocks but I can tell you that back in fraction days, there was a different rule for lower priced stocks. At that time, if the stock was over $10.00 then it was a 1/16 above the bid for a valid down-bid short, but it was only 1/32 for stocks trading under 10.00. I am not sure if they did something similar when we went to decimals or not.