Stocks Synced With Dollar Most Since 2008 on Fed Bets: Options

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U.S. stock and currency investors are more in sync than at any point in the six-year bull market.

The Standard & Poor’s 500 Index is trading in the closest lockstep since 2008 versus an exchange-traded fund that rises as the U.S. dollar gains. ETFs tracking the benchmark equity gauge and the greenback were inversely correlated for the first five years of the bull market, only turning positive last year after the Federal Reserve started scaling back its stimulus program.