Newton's Simon Laing has joined Invesco Perpetual as head of US equity fund management.
Markets moved lower on Monday as fears over Greece and Italy remained despite the imminent formation of a Greek coalition government.
Gabrielle Boyle has joined Troy Asset Management to work on its £59m Trojan Capital fund.
US markets are down 1% and the FTSE has moved into the red after the German finance minster dampened hopes for next weekend's EU summit.
The Royal Bank of Scotland (RBS) has been labelled the "most vulnerable" bank in Europe by Credit Suisse, in a note which also warns it may need further state aid.
The S&P 500 has opened down 0.85%, with financials under pressure after J.P. Morgan reported its third quarter results.
The S&P 500 closed up 3.4% overnight, boosting Asian shares and lifting the US index nearly 11% from lows seen last week.
The number of shares out on loan in September has risen by the highest level in five years as investors reacted to market falls by taking more negative bets.
The FTSE 100 has fallen as much as 3.5% as fresh eurozone concerns pushed the index down to the 4,900 mark.
The FTSE 100 has found support around the resistance level of 5,000 points as investors weigh up Greece's latest troubles.