The ideal size for a stock portfolio may be 250 or more positions, according to recent research.
Fast-money traders are finding little to get excited about in the current market.
Money is flowing out of mega-cap tech, and seemingly flowing into anywhere and everywhere else.
Politicians and academics argue the cash would be better used on things that aim at boosting long-term growth.
The long-term trendline for the S&P 500, currently sitting near 3,600, has recently become a battlefield for bulls and bears.
"Serious” headwinds are likely to push the U.S. economy into a recession in six to nine months, the JPMorgan CEO said.
There are theories that derivatives trading is driving movements in the topsy-turvy markets.
Just focusing on the Feds fund rate is a mistake, economist Ed Yardeni said.
Traders are betting on more turbulence in the short term than they are three months ahead.
Hedge funds tracked by Morgan Stanley raised bearish bets but refrained from cutting their long positions.
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