Quote from wabrew:
Mav, I have agreed with all your posts so far. But this one seems too 'set in stone'.
Isn't it true that mm's, since they are also selling 'premium', can also offset retail call buying with some put sales thereby gaining more premium. These put sales could then be offset by shorting stock as hedge -- thereby offsetting other mm stock purchases.
Or, in the case of a stock like GOOG, since there is such a large open interest in all the strikes, the mm can just buy/sell other put/calls as hedges - thereby not needing to engage in any stock transactions.
I have found it quite common that the bid/ask size on the options can be huge. sometimes it is 500x500 (not shares, options).
Nope. And let me explain why. First of all, there is not a mm in the world that is going to hedge short deltas in GOOG by selling puts. He wouldn't even do that with a stock like GE and certainly not GOOG. Why would a mm sell naked straddles when he can arb the shit out of GOOG all day long and go home to his family and put food on the table. No way he sells the straddle/strangle naked.
Now, let's move on to the other possibility. Let's say he sells the calls and can immediately turn around and buy them back on his bid. What happens here? Well, normally, if he bought the calls, he would have to sell the stock and therefore create selling pressure in the stock no? So by buying the calls back, the net effect is the same.
To understand how this work, a simple understanding of synthetics and put/call parity is important. Every trade a mm makes has a net effect. He is either trading the underlying as his hedge or he is offsetting the trade and mitigating the offsetting underlying trade. If you do the math, it works out the same. Get out a piece of paper and work some examples. You will see what I mean.
I know a lot of people on this board like to think mm's are cowboys or they just like to sell premium, but nothing could be further then the truth. These guys replicate their positions all day long for nickels and dimes and make a damn good living at it. No need to speculate on their part. And why should they.
When I worked at Letco, the 2nd largest mm firm on the floor in the late 90's, we had a guy a guy in the YHOO pit that took home about 750k a year. This was back in the day when YHOO traded just like GOOG. He never took a delta, never took a punt, all he did was c/r, locks, boxes, synthetics all day long. Slept like a baby at night.