Market Update From TrimTabs: Has "Buyer" Stopped Buying?

From TrimTabs, which has expressed a skeptical view on the identity of the disclosed futures buyer before

 Has "Buyer" Stopped Buying? S&P 500 Down 6.6% since Day before President Obama Announces Plan to Restrict Proprietary Trading by Banks.
The market cap of all U.S. stocks rose almost $7 trillion from mid-March 2009 through the end of December 2009. We cannot remember stock prices ever rising so far so fast on steadily declining trading volume. We also cannot identify anywhere near the amount of buying power that would be required to lift the market cap so much.
We have speculated that the Federal Reserve or the U.S. Treasury could be allowing a "buyer" to accumulate stock index futures to boost stock prices. Perhaps the "buyer" has stopped buying. We know that the S&P 500 has dropped 6.6% since the close on January 20, the day before President Obama announced a plan to restrict proprietary trading by banks. Moreover, the S&P 500 fell on seven of those 11 trading days.