July 31, 2026 | US Market Brief: Amazon's Earnings Snap the Nasdaq's Six-Day Slide
The Nasdaq fell for six straight days until one Amazon report pulled it back. AMZN surged ~15% in a single day, lifting the non-discretionary consumer sector (XLY) by 3.29%. The Nasdaq closed up 1.00% at 25,373.85. S&P 500 gained 0.70% to 7489.72; Dow Jones rose 0.53% to 52,485.03. The VIX plummeted to 15.99—a 6.44% drop in one day—fear evaporated faster than it arrived.
The rebound structure is worth a closer look: Amazon sits under non-discretionary consumer stocks, yet the tech ETF (XLK) dipped slightly (-0.22%). While Microsoft and other tech giants led the rally, the broader sector didn’t follow; money flowed only into names with earnings surprises, not indiscriminately across the board. Materials (XLB) tumbled 2.34%, industrials (XLI) rose 0.81%, energy (XLE) gained 1.00%—the market is picking its spots carefully.
Oil was another key theme today. WTI jumped 3.84% to $86.80, a notable single-day move. Geopolitically, Polymarket assigns an extremely high probability of the Israel-Iran ceasefire extending into early August; risk-off sentiment should have faded accordingly. Yet oil surged anyway—likely signaling new supply-side variables or improving economic expectations. With energy stocks up 1.00%, at least some capital is betting on a recovery.
A rare move in FX: Reuters reports the U.S. Treasury has instructed banks to prepare for intervention, potentially buying $5–10 billion of yen to stabilize exchange rates. The dollar index edged down slightly to 99.80. Direct government purchases of foreign currency are historically uncommon; if executed, this would hit the yen carry trade hard in the short term.
No surprises on rates: the 10-year U.S. Treasury yield rose to 4.74%. On Polymarket, traders now price a 60% chance of a 25-basis-point hike in September versus just a 2% shot at cuts—markets are fully pricing another rate increase. Yields holding near highs without sparking panic suggests the “higher for longer” narrative is still accepted—for now.
On individual stocks, Solventum (+7.08%) and Cognizant (+6.93%) led S&P 500 gainers. Kioxia Holdings’ latest report showed net profit surging 4,506% year-over-year—storage sector earnings elasticity is staggering. Meanwhile, SpaceX faces a wave of stock unlocks next week; combined with valuations near multi-month lows, short-term liquidity pressure could be significant.
Amazon saved the day—but what’s next? Can this earnings season deliver more such surprises? If major companies’ results fail to keep pace, today’s green candle may just reflect an oversold bounce. Watch two things: whether big-name earnings next week can sustain outperformance (determines if the rally continues), and whether the 10-year yield holding at 4.74% starts capping valuations (sets the ceiling).