Retail-Driven Speculative Frenzy Reignites S&P 500 Index Inclusion Effect
With retail speculation fueling a revived S&P 500 inclusion effect, are we witnessing a new market paradigm or a familiar bubble in the making?
Key Logic
The recent retail-driven speculative frenzy in the US equity market, manifested through a surge in trading volume of unprofitable, penny, and high-multiple stocks, elevated call option activity, heightened social media sentiment, and short squeezes, has significantly reignited the S&P 500 Index Inclusion Effect. This is particularly evident in the migration of non-S&P 400 mid-cap stocks and retail-favored stocks associated with hot themes like AI. While the outperformance driven by this inclusion effect primarily occurs pre-announcement and lacks persistence, it signals potential upside risks for the equity market in the short term, but may increase market downside risks over the long term (24 months). Concurrently, the narrow market breadth suggests that intra-market sector rotation may continue.
