As if professional mutual fund managers didn’t have it hard enough.

Not only do they have to contend with the growing popularity of low-cost index funds, which simply buy and hold the entire market, but now here comes another threat: robot stock pickers.

The use of computers to buy stocks isn’t new. So-called “quant funds” (short for quantitative analysis) have been around for years, relying on computer algorithms to identify short-term trading patterns and opportunities in the market.

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