US Dollar Index Reached Seven-Week High

The dollar climbed following a Federal Reserve interest rate hike and rising Treasury yields.

Updated on Sept. 18, 2026 in Stock Markets

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The US Dollar Index reached a seven-week high of 100.40 following a hawkish interest rate hike from the Federal Reserve. The index is currently on track to record a weekly gain exceeding 1%.

Why it matters

The increase in Treasury yields, supported by persistent concerns over energy-related inflation, has driven the dollar's recent appreciation. This shift reflects a tightening economic environment as market participants react to ongoing monetary policy adjustments.

The US Dollar Index sits at 100.40, approaching the 61.8% Fibonacci resistance level of 100.46. Meanwhile, the benchmark 10-year Treasury yield is at 5.00%, after touching a high of 5.04% earlier this week.

The players

Federal Reserve

The central bank of the United States manages the nation's monetary policy, including setting interest rates and regulating financial institutions.

UOB

United Overseas Bank is a multinational banking organization that provides financial analysis and economic projections for global markets.

The details

Rising Treasury yields and elevated oil prices provided significant support to the greenback this week. The market is closely monitoring these metrics as the index maintains a Relative Strength Index value of 64.

The Federal Reserve increased interest rates on September 16, 2026.
The US Dollar Index reached a seven-week high on September 18, 2026.
The benchmark 10-year yield previously hit a record high in 2007.
United States mid-term elections are scheduled for November 3, 2026.
An additional Federal Reserve interest rate hike is expected in December 2026.

Inflation
Sept. 18
Fed President Schmid Supported Rate Hike
Inflation
Sept. 21
Chicago Fed President Cited Demand in Inflation Fight
Inflation
Sept. 18
Bank of America Warned Fed Rates Could Exceed 5%

Market Dynamics

This dollar rally aligns with broader monetary tightening cycles, signaling a potential shift in long-term investor sentiment. It follows the pattern established by the Federal Reserve's interest rate adjustment cycles.

Retail investors should note that rising Treasury yields can influence mortgage rate adjustments and affect personal savings strategies. Portfolio allocations may require review as the dollar's strength impacts broader market volatility.

The takeaway

The dollar's recent climb underscores the sensitivity of financial markets to inflationary pressures and central bank policy. Investors should monitor ongoing energy cost trends as they remain a key driver of Treasury yield fluctuations.

What happens next

Market participants expect an additional Federal Reserve interest rate hike in December 2026, followed by another increase in the first quarter of 2027.