Stocks see-saw, yields slip as investors get week off to cautious start

Stocks seesawed on Monday while oil, the dollar and bond yields all fell as investors began the week cautious about prospects that U.S. interest rates could soon be raised. Shares in German drugs and chemicals group Bayer AG were among the most notable decliners, however, down as much as 3 percent after it unveiled a $62 billion bid for U.S. seeds company Monsanto Co . U.S. futures pointed to a fall of around 0.3 percent at the open on Wall Street, as investors continued to digest last week's su