Wall Street’s $5.1 Trillion Triple-Witching Is Next Market Test

The Federal Reserve on Wednesday began its policy easing with a bang. Much of the focus was on its decision to cut interest rates by half a percentage point from a two-decade high. But the key question for the bond market is where rates will land once all is said and done. Nobody knows for sure, and Chair Jerome Powell injected enough uncertainty to ensure a choppy ride ahead.