Warren Buffett's turn to cash indicates that now is not the best time for high equity exposure, David Einhorn wrote.

That conclusion is further supported by the fact that Berkshire had $277 billion in cash and U.S. Treasuries on its balance sheet as of the June quarter, another record for the company. Finally, Buffett repurchased a mere $345 million in Berkshire stock during the June quarter, which marks his smallest allocation to stock buybacks in six years.

In fact, Berkshire actually holds two S&P 500 index funds in its portfolio: the Vanguard S&P 500 ETF (NYSEMKT: VOO) and the SPDR S&P 500 ETF Trust (NYSEMKT: SPY). One top analyst on Wall Street predicts the S&P 500 will hit 15,000 by 2030, and if he's right, those index funds could deliver a return of 158% from here!

Warren Buffett bought $87 million of Sirius XM stock last week. But there are several concerns that make Sirius XM a risky investment.

Jefferies has been on a tear since Berkshire bought in. Check out the closer look of JEF stock and read why I rate it as a Buy.

Warren Buffett’s recent trimming of stock positions in Apple and Bank of America has raised questions about what it means for the current market and economy. Bill Smead, a top fund manager, sees parallels between Buffett’s actions now and his warnings before the dot-com crash in 1999.