Yahoo! Shares Inc.

As it was said on Friday, Microsoft refused to buy Yahoo! Inc.
Many were waiting for Monday to see how it would affect the company's shares.
So:

Yahoo! Shares Inc. over the weekend they fell by 15% from 28.67 to 23.02, although over Monday they rose to 24.93.

A Microsoft:

Microsoft shares rose over the weekend, but over Monday they fell again to Friday level and even slightly lower.