After the upper house election, the Japanese Yen rises 0.6% against the US Dollar, outperforming G10 currencies

    by VT Markets
    /
    Jul 21, 2025

    The Japanese Yen has strengthened, rising 0.6% against the US Dollar, outperforming all G10 currencies following the weekend’s upper house election result. Prime Minister Ishiba’s ruling coalition lost its majority, yet the PM has assured markets of his continuation in office, which provides some stability amid fiscal uncertainties.

    With local markets closed, Japanese bond yields remain unchanged, while narrowing yield spreads favour the Yen due to softer US yields. The options market indicates a rise in premium for protection against potential upward movement, and USDJPY is expected to show short-term weakness within the 142-148.50 range.

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    The content does not offer personalised financial advice and is not liable for any errors, omissions, or resulting losses. Neither the author nor the source are registered investment advisors, and the article is not intended as investment advice.

    We see the Yen’s recent strength as a direct response to the election where Ishiba’s coalition lost its upper house majority. The currency’s climb to a one-month high against the dollar shows the market is pricing in potential fiscal policy shifts. This political uncertainty, combined with other factors, creates an environment where derivative traders should be cautious of dollar strength.

    Options Market Signals

    In the options market, we are observing a clear signal as traders pay higher premiums for protection against a falling dollar-yen pair. One-month risk reversals for the currency pair recently hit their most negative level since late September, indicating a strong and growing bias for downside exposure. This suggests that participants are actively hedging against or speculating on further appreciation in the Japanese currency.

    This move is reinforced by the narrowing yield differential between the United States and Japan, which is a key driver for the currency pair. US 10-year Treasury yields have fallen below 4.5% following recent data showing a slowdown in the American labor market, making Japanese assets more attractive by comparison. We expect this dynamic to continue weighing on the dollar as long as US economic indicators suggest a less aggressive Federal Reserve.

    Historically, the Bank of Japan has intervened to support its currency when it weakens rapidly, as it did multiple times in 2022 when the pair moved past 150. The current environment is the reverse, where yen strength reduces the immediate pressure on authorities to alter their ultra-loose monetary policy. This gives traders more confidence to bet on the yen without fearing imminent official opposition.

    Given these conditions, we believe traders should position for continued short-term weakness in the dollar-yen exchange rate, using the 142 to 148.50 range as a guide. Selling call spreads with a strike price above 148.50 can capitalize on range-bound behavior and elevated option premiums. For a more direct bearish stance, purchasing puts with strikes near 143 would benefit from a continued move lower.

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