US Dollar Index ticks higher within range as midterm elections take centre stage

  • Below 102.00, the US Dollar Index is recovering from its session lows while trading within its earlier ranges.
  • Hostilities in Iran and rising oil prices are underpinning the Greenback, although uncertainty over US politics is restraining its advance.
  • A Democratic sweep could weigh on the USD in the short term, according to ING experts.

From session lows around 101.50, the US Dollar Index (DXY) has recovered but remains below the 102.00-102.10 area that limited advances on Monday and Friday. The US Dollar is modestly firmer against most major peers on Tuesday, as renewed hostilities in Iran raise doubts about the peace process and push oil prices higher. However, uncertainty surrounding the US midterm elections has so far constrained gains.

TMGM Analysis: Financial Market News, Economic Calendar & Market Insights

Growing fears that hostilities in Iran will resume are lending the Greenback some support. Those concerns follow US military strikes on targets on Iran’s Qeshm Island in the Strait of Hormuz, which US authorities described as a “defensive” operation.

Trump maintains optimism over an Iran peace agreement

Diplomatic efforts to return both sides to the negotiating table are continuing, with some backing from the US. Playing down the prospect of all-out war, US President Donald Trump said a peace agreement with Iran “could happen,” adding that he believed Tehran "wants a settlement, as soon as possible."

Monday’s US ISM Manufacturing Purchasing Managers’ Index (PMI) figures indicated that factory activity was stronger than expected, while price pressures remained elevated. The readings suggest that the US economy began the fourth quarter on a firm footing.

Despite that strength, the figures offered little meaningful support to the US Dollar, with investors waiting for the US midterm election results before making investment decisions. ING strategists say they “don’t expect today’s US midterm results to cause structural shifts in FX.” Nevertheless, the bank’s analysts warn of possible “short-term pressure” on the Dollar should the Democrats win both the House, an outcome that is “widely expected,” and the Senate, where the contest is a “close call.”

US midterm elections: key questions answered

Held midway through a president’s four-year term, the US midterms are federal elections in which voters elect all 435 members of the House of Representatives and about one-third of the Senate. In many states, voters also choose governors and other state and local officials.

Tuesday, 3 November 2026 is Election Day, in line with the federal law requiring elections to be held on the Tuesday after the first Monday in November. Many states already have early and postal voting under way.

Control of each chamber of Congress during the last two years of President Donald Trump’s term will be determined by these elections. Whichever party holds the majority sets the legislative agenda and appoints committee leaders. In the Senate, it also controls the confirmation of judges and senior officials.

The president is not on the ballot: presidential elections take place every four years, with the next scheduled for November 2028. Often regarded as a referendum on the incumbent president’s party, midterms have historically tended to cost that party seats in the House.

Rather than a sustained trend, most analysts anticipate a small, temporary response in the US Dollar. Markets have partly priced in a divided Congress, widely regarded as the central scenario, although Treasury yields could respond more markedly to the results. Election outcomes that increase expectations of fiscal stimulus typically push yields and the US Dollar higher; conversely, legislative deadlock that curbs fresh spending can weigh on both. Disputes over funding or the debt ceiling can also give the Dollar a brief boost through safe-haven demand. Over six to twelve months, however, economic growth and Federal Reserve policy carry more weight than the election outcome.

Historically, US equities have tended to weaken ahead of midterm elections and strengthen afterwards. Since 1950, the S&P 500 has recorded gains in the 12 months following every midterm election, 19 out of 19, averaging about 15%. Analysts attribute this pattern to the easing of uncertainty after the results become clear. Past performance does not guarantee future returns, and some strategists suggest that elevated valuations in 2026 could put that record to the test.

By reducing the likelihood of sweeping tax, spending and regulatory changes, political deadlock has often made divided government welcome in markets. With a Republican president in office, the S&P 500 has historically performed well in the years after midterms that divide control of Congress. Funding deadlines, disputes over the debt ceiling and congressional investigations nevertheless pose risks that can increase short-term volatility.