Dollar index rises 2.1% in a month to 121.40; yen at 158 per dollar, euro at $1.12

The US dollar has strengthened against major currencies in the past month, with the yen near 158 per dollar and the euro below $1.13, according to exchange-rate data from the Federal Reserve.

The dollar index

The Fed's nominal broad dollar index, a trade-weighted measure of the dollar against a basket of currencies, was 121.4048 on October 16. It was 118.9206 on September 16, so it has risen 2.1% in a month, and it was 120.6698 a year earlier, a rise of 0.6% (computed). The index peaked for 2026 at 122.0037 on October 14, and its low for the year was 117.4396 on January 29.

The euro

The euro bought $1.1231 on October 16. On October 14 it closed at $1.1123, its weakest in 2026, according to the Fed's euro series. It was $1.1538 on September 16 and $1.1665 a year earlier, so it is down 2.7% in a month and 3.7% over the year (computed). Its high for 2026 was $1.1980 on January 27.

The yen

The Japanese yen was 158.00 per dollar on October 16, according to the Fed's yen series. That is weaker than 155.08 on September 16 and 150.75 a year earlier. The 2026 range is 152.64 (February 12) to 163.86 (July 29). The yen-per-dollar rate is 3.6% below its July 29 level (computed).

Limits of the data

The Fed's H.10 exchange-rate release is published weekly, so the latest values here are October 16. The series have no value for October 12, a US federal holiday.