** Standard Chartered unable to hold onto their early gains and slip to day's lows
** Following news of boardroom shake-up shares opened 3.7pct higher, partly on short-covering, before paring gains tolast trade up less than 1 pct
** Heavy volumes with more than a $100 mln traded in firsthour making it the top-traded UK stock
** StanChart says former JPMorgan investment bankboss Bill Winters will take over as CEO in June to replaceembattled boss Peter Sands
** Bank's shares have lost about a quarter of their valuesince Peter Sands took charge as CEO. Chart: http://link.reuters.com/duq24w
** They have, however, outperformed the broader UK bankingindex as well as the European banking index which are both down about 60 pct over the same period
** 9.7 pct of shares available to borrow currently out onloan, according to Markit, making StanChart the 5th mostborrowed financial stock on the FTSE (RM: vikram.subhedar.thomsonreuters.com@reuters.net)