The dollar maintained its losses on Tuesday as markets continued to digest the Trump administration's unprecedented decision to launch a criminal investigation into Federal Reserve Chair Jerome Powell, a move that has raised serious questions about the central bank's independence and investor confidence in U.S. assets.

Market Reaction to Fed Investigation

Investors remained cautious following news of the probe revealed late Sunday, which drew widespread condemnation from former Fed chiefs and marked a significant escalation in presidential pressure on the central bank to cut rates more aggressively. The market response included selling of both the dollar and U.S. Treasuries, with some investors turning to gold as a safe haven asset.

However, the selloff proved more measured than the dramatic reaction following Trump's sweeping tariffs in April. "The episode was mild, with losses in both USD and USTs fractional, as markets probably believe this is an act of threat that will blow over," said Vishnu Varathan, Mizuho's head of macro research for Asia ex-Japan.

Fed Policy Implications

The investigation raises complex questions about future monetary policy direction. While the move has not significantly altered market expectations for two additional Fed cuts this year, it creates uncertainty about the central bank's autonomy—a fundamental pillar of U.S. economic policy.

"The picture for the dollar is somewhat mixed," explained Sim Moh Siong, FX strategist at OCBC. "In terms of what the Fed should do, the Fed should be more reluctant to cut rates, against data pointing to resilience of the economy... but there is also a question as to what the Fed would do eventually."

Fitch Ratings emphasized on Monday that it views the Fed's independence as a key supporting factor for its AA+ U.S. sovereign rating, highlighting the broader implications of political pressure on the central bank.

Treasury Market Response

U.S. Treasury yields showed mixed movements, with the benchmark 10-year yield settling at 4.1713% after slight easing from the previous session's gains. The two-year yield remained near Monday's three-week high at 3.5323%.

Japanese Yen Under Additional Pressure

The Japanese yen faced separate challenges, declining to a one-year low of 158.285 per dollar amid speculation about a potential snap election. Prime Minister Sanae Takaichi may call an early general election, according to her coalition partner, with media reports suggesting she is considering a February vote.

Japan's Finance Minister Satsuki Katayama expressed shared concerns with U.S. Treasury Secretary Scott Bessent over the yen's "one-sided depreciation." Market analysts suggest investors are pricing in scenarios where Takaichi's coalition gains more lower house seats, potentially enhancing her ability to implement looser fiscal and monetary policies.

Regional Currency Movements

Other major currencies showed mixed performance, with the Australian dollar remaining flat at $0.6710 while the New Zealand dollar gained 0.05% to $0.5775. Australian consumer sentiment slipped in January according to a private survey, as households grappled with renewed rate concerns and economic uncertainty. Conversely, New Zealand's business confidence reached its highest level since March 2014 in the fourth quarter.