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10/06/09 12:19 AM

#227786 RE: nuubie #227650

He didn't say that quite right: MMs can "participate," i.e., they can trade for their own accounts, e.g., to cover shorts.

But they can't make market; no bid/ask will be shown. Therefore, to use your example, a sell order at .015 will have to be matched by a buy order for .015; a buy order at .0002 would have to be matched with a sell at .0002.