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RISK-OFFDaily report · Tue Jul 21

Wall Street slips as Nikkei tumbles 4% amid rising volatility

The Nikkei plunged −4.03% in a statistically extreme session (z=−2.5), tilting the overall tone toward risk-off alongside moderate losses in Wall Street and Europe, a VIX up +12.2% to 18.8, and gold advancing +1.02% on haven demand. No alert-level signals emerged: the yield curve, credit spreads and VIX term structure stayed within normal ranges, though cross-asset correlations weakened notably.

Risk bias
RISK-ON

Regime Atalor assigns to the session.

Volatility
15.2 · −4.2%

VIX and its change in the session.

Largest deviation
UST 2y +1.5

Standard deviations from its prior year. Above 2 is exceptional.

Alerts
0 of 60

No series at high severity.

Markets closed the session with a clearly defensive tilt. The most visible shock came from Tokyo, where the Nikkei plunged −4.03% (z=−2.5 versus the past year), a decline among the most severe of the period under review. Wall Street followed with more modest but broad-based losses: the S&P 500 fell −1.01% (z=−1.4) and the Dow Jones −0.59% (z=−0.8), while the Nasdaq barely moved (−0.05%, z=−0.1). In Europe, the banking-heavy EuroStoxx proxy (FEZ) slipped −0.80%, Spain (EWP) −0.83% and Germany (EWG) −0.70%, all within typical ranges. Risk appetite softened accordingly: the VIX jumped +12.2% to 18.8 points (from 16.7), and gold advanced +1.02%, consistent with modest safe-haven demand.

In commodities, oil retreated: WTI dropped −1.36% and Brent −0.81%, widening the Brent-WTI spread to 6.40 dollars, above its historical median reference of 3.5 dollars and up 3.3 dollars over the past twenty sessions. In currencies, the euro edged up +0.03% against the dollar and the yen was essentially flat (−0.01% in usdjpy), while the broad dollar index rose +0.17% on the day and trades 0.6% above its 50-day average (120.5 versus 119.8). Crypto assets were the day's bright spot: bitcoin +0.83%, ether +1.72%, solana +1.90% and XRP +1.33%.

No alert-level signals were recorded across the monitored set; the only notable flag was the Nikkei's decline, of a magnitude clearly above the rest of the session's moves, which stayed within normal ranges.

The yield curve continues to show no inversion signal: the t10y2y spread stands at 0.39 percentage points, 682 days after its last crossing, and t10y3m at 0.74 points, 276 days after its own crossing. Credit markets show no stress either: the high-yield spread sits at 2.73 percentage points (z=−1.0), below its one-year average level. The VIX term structure remains in contango, with a VIX/VIX3M ratio of 0.91 (VIX3M at 20.54), consistent with a relatively calm reading despite the day's volatility uptick. Thirty-day correlations have weakened notably: sp500-ust10y moved from −0.82 to −0.47, sp500-broad dollar from −0.69 to −0.30, and sp500-WTI from −0.59 to −0.21, suggesting assets are trading less in sync than a few weeks ago. Market breadth remains contained, with 47.1% of tracked assets above their 50-day average and 58.8% above their 200-day average, across a universe of 17 assets.

Going forward, it's worth watching whether the Nikkei's weakness spreads to other Asian markets or remains an isolated episode, given the statistically extreme nature of its drop (z=−2.5). The widening Brent-WTI spread to 6.40 dollars, nearly double its historical median of 3.5 dollars, also merits attention, as does the VIX's recent jump (+12.2% to 18.8), which — while not breaking the contango structure — marks the sharpest recent move in implied volatility.

Written by Atalor · Tuesday, July 21, 2026 · 05:01 UTC · 60 series analyzed