Scott Rubner, a technology family at Goldman Sachs Group, pointed out that investors will have a short window of bargain-hunting at the end of August as selling pressure from systematized funds eases and public companies increase share buybacks. Rubner said this was his last bearish in August, as the worst mismatch between supply and demand in the stock market will end in August, after which he will turn tactically bullish on August 30. Previously, Rubner had recommended in late June to reduce exposure to US stocks after July 4. Sure enough, the index has fallen about 6% so far since closing at a record high on July 16. Rubner also cautioned investors that after a certain point in September, the stock market outlook will deteriorate, and there will be no significant trend line increase in the market until the fourth quarter and the November U.S. election.