from a small investor's stand point, that is true, *however*
if you are a market maker. you are forced to sell whenever you put up an ASK and forced to buy whenever you put up a BID. therefore, they have a few limitation. MMs cannot cover whenever they want. this includes ripping off fellow market making firms. just imagine, if Smith Barney ripped Merryl Lynch off, what kind of all-front war will it start. the market is in favor of a joint collaboration.
it is difficcult if you are a small investor because you dont have 1) the money resource, 2) the equipments, 3) the personel, and 4) the type of inside info to deal with. therefore, trading is simply done and easily dominated by people who has faster access to market related info whether it is real time trading access or company financials, and thus the MMs.
when the street is short on a stock, as market makers force to sell short to buyers cuz they dont have stocks in inventory, CUBE will not likely turn out to be a winner long-term.
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