There has been a shake-up at the top of Credit Suisse's US equities business

Darlene Pasquill, the head of Americas equities at Credit Suisse, has left the bank.  Her departure follows a series of changes in the Swiss bank's equities business.    There has been a shake-up at the top of Credit Suisse's US equities business.  Darlene Pasquill, a Credit Suisse veteran and the head of Americas equities business, will be leaving the bank to pursue external opportunities, according to an internal memo seen by Business Insider. She had been in that role since...