What's more, numerous studies have shown that most investors earn far lower average returns than the overall stock market because they are unable to handle the volatility and end up selling when stocks fall, only to buy again after they have recovered.
The daily scrutiny of stockmarket analysts, and the likely high volatility of quarterly results, may mean no end of hassle from investors for the managers.
Traders suggest that the Fed's indication that it may be nearing the end of its cycle of interest-rate increases will probably make the volatility and trading volume jump even more.