USD/JPY's slide from last week's highs near 160.00 showed no signs of abating on Tuesday, breaching 154.00 in Asian trade and extending losses to 152.89.

It's the options market telling the real story, however: Since the September 2-3 breakdown, demand for volatility and downside protection has been relentless, with 150.00 strikes actively sought. One-month implied volatility surged through the late-July intervention high of 10.5, trading as high as 11.4 in Asia — the highest in over a year — while even 1-year expiry vol is participating in the repricing. The skew tells the same story: 1-month 25-delta risk reversals jumped from 1.75 to 2.75, just shy of July's 3.0 peak, while the 3-month tenor has actually eclipsed that high at 2.0, its richest since May 2025. USD/JPY traded volumes are running at double the year-to-date norm, with downside protection demand more than double that at any point since January 2024 — a market caught offside by the scale of the move.

EUR/USD remains the polar opposite, sleepwalking through event risk with implied volatility remaining close to long-term lows. Large option expiries clustered around 1.1600 are helping pin the pair in its recent range, reinforcing the lack of movement even with the ECB and U.S. CPI both due this week.

That lack of conviction runs across G10 FX. Implied vol remains stuck at multi-year lows in almost every major pair bar JPY, and realised vol is often lower still — genuine calm, not mispricing. Positioning reflects the same story: Outright flows are thin, and demand for low-delta, tail-risk strikes has dried up. Risk reversals reinforce it — EUR/USD's 1-month 25-delta briefly reached 0.45 in favour of downside strikes through late August/early September but has already faded back to 0.2, while GBP/USD's equivalent eased from a 0.6 peak to 0.45. Both flirted with a USD-bullish skew and are already unwinding it.

The clearest expression of this malaise is EUR/GBP, where implied volatility is trading at record lows — 3.0 for 1-month, 3.6 for 3-month, 4.75 for 1-year. If options are the market's best guess at future movement, EUR/GBP is currently pricing in very little.

Together, it's a market split in two: JPY in the grip of a genuine, broadening repricing, and the rest of G10 stuck in a holding pattern, aware of the geopolitical and macroeconomic risks but unwilling to commit to a direction just yet.
EUR/USD 25 delta risk reversals-


Benchmark 1-month expiry FXO implied volatility


EUR/USD FXO strike expiries Sept 8-11

(Richard Pace is a Reuters market analyst. The views expressed are his own)