Bond Volatility in US Eclipses Europe as Recession Angst Rises

Bond traders are bracing for wilder market swings in the US than in Europe, as signs the world’s largest economy is faltering fuel bets on a jumbo interest-rate cut from the Federal Reserve.

A measure of upcoming volatility in rates, or so-called swaptions, has risen in the US this week as weaker activity data boosted the view policymakers will lower rates by half a point later this month. In contrast, the equivalent euro-area gauge was little changed, with the European Central Bank widely expected to cut rates by a quarter point.

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Investors have long considered the prospect of a larger-than-usual reduction from the Fed this year. But the chances increased markedly after data showed US manufacturing activity is contracting and as equity markets went into another tailspin led by Nvidia Corp. Traders now see about a 30% chance of a 50-basis-point move when the Fed sets rates on Sept. 18, up from 20% last week.