Sirens Are Sounding for the Best ETF Trade Ever

This time is different for an ETF used to bet on rising rates?

The U.S. Federal Reserve building in Washington.

Photographer: Brendan Smialowski/Bloomberg
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Here we go again.

Interest in the most popular exchange-traded fund that's used to bet on increasing U.S. interest rates is rising again as investors speculate that the Federal Reserve may embark, as early as next month, on its first hiking cycle in almost a decade.