From 24/7 Wall Street:
Monday, something rare and unsettling happened in the markets. Equities, bonds and the dollar index were all down, while at the same time commodities were up. This is very rare because when stocks are down, investors typically seek safe havens in either U.S. treasuries or the dollar or both, which tend to rise to compensate. If both stocks and bonds are down together, which is uncommon but not exactly rare, then the dollar usually rises as the safe haven that day.