On September 21, SPDR Portfolio S&P 500 Growth ETF surged 5.75% overnight, trading at $128.46/share, with turnover of $128.0.

The rally was driven by a confluence of catalysts. The S&P 100 Index rebalancing officially took effect on September 21, with tech names such as SanDisk being added to the index, triggering concentrated buying from passive funds and fueling a sharp late-session surge. The Philadelphia Semiconductor Index broke above its 50-day moving average, with storage and optical communication names leading the advance — SanDisk soared approximately 11% in a single session, while Micron Technology and Seagate also posted notable gains, signaling AI hardware has re-emerged as the rally vanguard.

Broader context supports the move: the Fed's recent 25-basis-point rate hike failed to derail equities, as AI chip stocks led a sharp reversal the following session, with the S&P 500 reclaiming its 50-day moving average. Semiconductor recovery breadth has been improving, with gains spreading across equipment, storage, and analog chip segments, reinforcing the structural repair in growth-oriented sectors.

SPDR Portfolio S&P 500 Growth ETF generally invests substantially all, but at least 80%, of its total assets in the securities comprising its benchmark index, which measures the performance of the large-capitalization growth segment of the U.S. equity market.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)