The rebound suggests a more ... causing markets to major slump. The potential Fed shakeup, coupled with uncertainty about trade policy, sent the Dow tumbling over over 1,000 points on Monday.

The stock was up 5.5%, at $283.20, in midday Wednesday trading. It is still down about 30% since the start of the year. Shares fell as much as 6.4%, to a low of $251.27, in the morning session ...