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Dollar struggles for traction as markets weigh Iran sanctions, Treasury buybacks

  • The euro ‌was a shade higher at $1.1668, hovering near a three-month peak hit last week
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HONG KONG: The US dollar struggled to hold onto gains against major peers on Tuesday, ​as investors parsed Washington’s expanded Iran-related sanctions and renewed efforts to ease pressure on longer-dated Treasury yields.

The euro ‌was a shade higher at $1.1668, hovering near a three-month peak hit last week, while sterling was 0.1% stronger at $1.3639, near its six-month peak.

US Treasury Secretary Scott Bessent unveiled an expansion of sanctions against Iran on Monday, and warned countries to cut business ties to Iran or risk being forced ​out of the dollar-based financial system.

“That potentially is one source of a slight reversal of the dollar weakness that ​we had at the end of last week,” Ray Attrill, head of FX strategy at National ⁠Australia Bank, said in a podcast.

“The suggestion being that, maybe if you’re going to be sanctioned and you’re not going ​to have access to US dollars, then you better buy some dollars first before that happens.”

The Canadian dollar held flat at $1.3844, steadying ​after a 0.6% dip in the previous session, as the US threatened to raise tariffs on Canadian goods after trade negotiations collapsed.

The Japanese yen strengthened a tad to 159.21 per dollar, having given back most of its intervention gains but still well off a multi-decade low of about 164.

The dollar ​index , which measures the U.S. currency against six major peers, was down marginally at 98.96 in Asia trades.

It climbed 0.16% overnight, lifting ​it from three-month lows amid a revived debasement trade, but appeared to be struggling to sustain the momentum.

The New Zealand dollar and the Australian ‌dollar were ⁠up 0.1% ahead of the Reserve Bank of Australia’s August policy meeting minutes release, last trading at $0.5965 and $0.7157, respectively.

In cryptocurrencies, bitcoin was last up 1% at $78,817.34, after registering its largest weekly gain in nearly 3-1/2 years last week.

Yields ease, but relief limited

Treasuries found some support after CNBC reported that the U.S. Treasury could use part of its cash balance to buy back longer-dated bonds in ​an effort to ease borrowing ​costs.

That comes after Bessent surprised ⁠global bond investors last week by announcing the Treasury would double the size of its quarterly repurchases of longer-dated bonds after their yields reached the highest levels in nearly two decades.

However, the ​relief was limited. The yield on the 2-year note , which typically moves in step with ​expectations for Federal ⁠Reserve interest rates, was flat at 4.246%, while the yield on benchmark U.S. 10-year notes was at 4.704%.

Market participants are also awaiting Federal Reserve Chair Kevin Warsh’s debut speech in Jackson Hole, Wyoming, on Friday, as traders seek clues about the recent jump in bond yields ⁠and reassurance ​about his independence from the Trump administration.

“Uncertainty over the Fed’s reaction function, ​coupled with growing doubts about its commitment to prioritising inflation, has sharpened attention on Chair Warsh’s upcoming remarks at Jackson Hole,” Sim Moh Siong, FX strategist ​at OCBC, wrote in a note.

“Renewed policy uncertainty is constraining the scope for USD gains.”


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