On the day it was confirmed that a Mediterranean diet can reduce the risk of cardiac conditions plentiful political food for thought out of Italy was enough to give investors a heart attack. Dow Industrials (^DJI) endured their single worst session since November 7 2012 losing 154 points in last hour alone.   All eyes are on March 1 and the sequester but April 1 is more relevant for investors in Chesapeake Energy (CHK). That is when its endlessly controversial CEO Aubrey McClendon who appears to take many shareholders for April Fools is set to step down. And not a moment ...