Stock investors flag worries amid bull run

“What is keeping you up at night?” It's a question that might elicit any number of answers from equity investors right now. With share prices at such extended levels in countries all around the world, it seems that the only way is down. “I find it very difficult to find a screaming bull anywhere in the world,” noted Chris Lees, senior fund manager at JO Hambro, speaking on a panel at AsianInvestor's Southeast Asia Institutional Investment Forum yesterday. “Everyone's talking about…