VB is trading $299.56, up 3.48%, with no verified late-breaking earnings or dominant-holding announcement explaining the after-hours move.

  • The September 18 regular-session close was $289.61.
  • Technology-led futures gains and retreating Treasury yields were mildly supportive, while the S&P SmallCap 600 was essentially flat during the regular session.
  • The move appears ETF-specific or liquidity-driven rather than tied to a confirmed sector catalyst.