ALAB is trading 9.1% down today at $399.85 as investors unwind short-term positions following the stock's official inclusion in the Nasdaq-100 index.

  • The sharp pullback follows a period of significant volatility and heavy passive buying as ETFs and funds rebalanced to accommodate the index change.
  • Analysts suggest the decline is driven by momentum traders taking profits after the inclusion event, rather than any new negative company-specific developments.