Artificial‑Intelligence Rally Returns: S&P 500 Short‑Cover Surge and Chip Sector Momentum

The S&P 500 has reached a new breaking point after months of volatility, hovering just shy of historic record highs.

Semiconductor Index’s Lightning Surge

The PHLX Semiconductor Index (SOX) has risen 15% since the July 29 close, leading the market rally in chip stocks.

■57 out of 61 semiconductor stocks remain higher since July 29.

■The median stock is up roughly 15%.

■The index aims to break 12,500 and push toward 13,000.

Mega Short Cover: Unwinding the Bearish Bet

Jim Bianco described the recent wave of short‑selling pressure as a “mega short cover,” propelling the Nasdaq‑100 to achieve one of the strongest four‑day runs in two decades.

■The worst‑performing fifth of the S&P 500 rebounded a median 8%.

■The best‑performing group is down about 1%.

■Lagging chip stocks have outperformed the top performers by a factor of three.

Heavyweights’ Strategic Moves

Citadel acquired the public portfolio of Leopold Aschenbrenner’s “Situational Awareness” fund on July 30, a day after the Fed meeting, easing the overhang from leveraged AI positions.

■The transaction sparked a redistribution of roughly $2.5 trillion in market value.

■Microsoft, Nvidia, Amazon, and Alphabet together added about $2.5 trillion; Apple fell 8%, erasing $400 billion.

Technical Levels and Market Depth

SOX must hold above 10,500 to avoid downside pressure, while clearing 12,500 and 13,000 would cement the rally’s durability.

■Closed at 12,008.88, a ‑1.40% decline.

■The equal‑weighted S&P 500 is up less than 2%, with the median index member up less than 1%.

Ege Kaan – Wall Street and U.S. Macro Strategy Lead: The broadening of the chip index, fueled by short‑covering liquidity, may appear as a temporary thrust, yet the $2.5 trillion market‑cap infusion by AI‑centric megacaps signals a durable growth trajectory for the sector. Apple’s ‑8% slide, however, flags a sector‑rotation risk; maintaining portfolio diversification and monitoring key technical thresholds will be essential.