The US dollar strengthened on Fed’s announcement on Wednesday that it would not be raising interest rates in spite of the economy's surprising resilience in the face of the bank's vigorous tightening, which it had begun more than a year ago.

In a policy statement following a two-day meeting, Fed policymakers unanimously decided to maintain the benchmark overnight interest rate in the range of 5.25% to 5.50%, where it has remained since July.

However, there is now more betting on U.S. interest rate futures that the Fed would begin reducing rates by June of next year, having finished hiking its policy rate. The percentage of bets on rate hikes in December and January has decreased to 19% and 30%, respectively, from late Tuesday's 28% and 39%.

The dollar index ticked up by 0.3% at 106.97.

EUR/USD slipped 0.3% to $1.0547 after figures on Tuesday revealed a decline in inflation and growth in the euro zone, and in the wake of the Fed's announcement.

GBP/USD dipped 0.4% to $1.2111.

USD/JPY dipped 0.4% to 151.09. The currency pair usually follows changes in the yield on the US two-year Treasury note, which dropped 6.9 basis points to 5%.