Oppenheimers Downgrade Means That They Are TAKING A LARGE POSITION.
They are most likely responsible for lots of the ILLEGAL quote spamming and interruption of the orderly flow of data to the NASDAQ trading window on Friday. With the Que overloaded with quotes they were able to trade through at will to lower prices. Oppenheimer has been doing this for years when taking a position in a company, which likely will be involved in some short of shorting. They did this to AVII on at least several occasions once the position was so large that it had to be reported.
They might be the ones responsible for tearing out the pages of the SEC rules regarding interruption of the orderly trade flow from Mary Schapiro's copy of the SEC rule book. It is a shame she did not read those rules and regulations at this mornings Wall Street sponsored breakfast.