Bank of America Securities analysts warn the chance of coordinated intervention in the USD/JPY market has risen. A rate check by the New York Fed last week sent the pair to 154.20, its strongest since November. This marks a new, possibly significant development, as the Fed's FX desk typically acts behind the scenes.

The U.S. Treasury's motives are unclear but could include weakening the dollar for trade competitiveness, supporting U.S. Treasuries, or aiding ally Japan. BofA notes this signals a more activist U.S. Treasury. If weakening the dollar is the primary goal, intervention odds rise materially, with bearish implications for the dollar.

For now, BofA expects USD/JPY to stay below 160 near term, especially through Japan's February 8 election. However, the uptrend may resume later, likely prompting unilateral intervention from Japan's Ministry of Finance. Strong U.S. growth and Japanese outflows could pressure the pair higher, increasing the likelihood of coordinated action if U.S. inflation remains contained.