August 6 market wrap: Dow drops as VIX eases

All three major benchmarks finished lower

U.S. stocks closed lower on Thursday, August 6, 2026. The S&P 500 ended at 7,709.96, down 13.59 points, or 0.18%. The Nasdaq-100 lost 114.47 points, or 0.39%, to 29,373.33, while the Dow Jones Industrial Average fell 464 points, or 0.85%, to 53,885. Official Cboe delayed feeds supplied each closing level, previous close and regular-session move; the arithmetic was recomputed before publication.

Volatility eased even as Treasury yields rose

The Cboe VIX closed at 15.15, down 0.66 point, or 4.17%, from 15.81 on August 5. The U.S. Treasury’s official daily curve put the 2-year par yield at 4.25%, seven basis points above 4.18%, while the 10-year rose to 4.69% from 4.63%, a six-basis-point increase. A lower VIX on a down day is not contradictory: the index reflects expected S&P 500 volatility over roughly 30 days, not the direction of one session or the pricing of every individual stock option.

Wheel watch: Nebius fell while Microsoft advanced

Within the live YieldCove watchlist, Nebius Group closed at $189.88, down $29.11, or 13.29%, from $218.99. Microsoft closed at $499.86, up $12.40, or 2.54%, from $487.46. These are verified regular-session moves from the same Cboe delayed-quote source. No single-company catalyst is assigned here because a closing-price feed establishes the move, not its cause; separating those claims prevents a plausible narrative from being printed as fact.

For cash-secured puts, a large share-price move changes the dollar collateral at a given moneyness and can reprice downside skew; for covered calls, it changes how far a strike sits above the stock. Neither close reveals the next session’s executable option market. Premiums are quoted per share, one standard contract normally represents 100 shares, and assignment exposure must be evaluated against the complete cash or stock commitment rather than the headline percentage alone.