Dance of Investing Styles Doesn’t Signal a Downturn

The U.S. stock market notched yet another record on Wednesday, and many investors are anxiously looking for signs of a slowdown.

Perhaps not coincidentally, researchers at Sanford C. Bernstein & Co. say they’ve spotted one. According to Bloomberg News, Bernstein has found that correlations among investment styles — or factors — such as value and momentum “have shot to all-time highs.”

That means they are moving in the same direction, and that is apparently a bad omen. As Joseph Mezrich, managing director at Nomura Securities International Inc., told Bloomberg, “In the past factor correlation has tended to rise in periods of macro stress.”

The concern is likely to interest more than just wary investors. Factor investing is increasingly popular. Investors have poured $352 billion into value, momentum, quality and other factor exchange-traded funds since 2013, according to Bloomberg Intelligence, nearly double the $191 billion in factor ETFs at the end of 2012.

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