Hedge funds flock to yen options ahead of U.S. inflation

Hedge funds and other currency investors increased purchases of dollar-yen options before the U.S. inflation report, pushing one-week implied volatility higher for a second session after five straight days of declines. Volatility also rose across longer-dated contracts.

Traders bought short-dated protection around the inflation release, viewed as a key input for the Federal Reserve’s interest-rate outlook and the dollar’s path. With no clear consensus on the next move in dollar-yen, options are being used to retain exposure while limiting large outright directional bets.

In the short-dated market, dollar-yen put options traded at a premium to calls as participants sought cover against a rapid yen appreciation. That caution reflects concern that U.S. and Japanese authorities could intervene again after recent coordinated action. At medium and longer maturities, demand for dollar-yen calls remained strong, indicating some investors are positioning for a later dollar rebound.

Ivan Stamenovic, Bank of America’s head of Asia Pacific G-10 currency trading in Hong Kong, noted the market was “paying for flexibility rather than conviction.” Nicky Lam, a director on Citigroup’s G-10 FX options team in Singapore, pointed out that short-term flows had been skewed in favor of yen strength through leveraged trades, while medium-term investors continued buying calls on the dollar. Nomura International reported many funds were keeping relatively light outright positions because high-conviction trades are difficult with U.S. data risk and the prospect of intervention.

Dollar-yen moved through a wide range in recent weeks. The pair fell to about JPY155 after the first coordinated U.S.-Japan intervention in the yen market since 1998, then recovered to near JPY160. Those swings reduced appetite for aggressive bets on either sustained yen weakness or renewed strength.

Market participants will watch the inflation report for clues on Fed policy timing and magnitude and monitor how positions in the dollar-yen options market adjust after the data.