Skip to content
Equity Capital Market
  • Start Here
  • Research
    • LightPath Deal
    • Plug Power ATM
    • Standard Nuclear IPO
  • Latest
  • Stock Market
  • Market Education
  • Capital Markets
  • Federal Reserve & Rates
  • About
  • Contact

index inclusion effect

Reddit Joins the S&P 500 on Aug 18: Shares Pop 8.8%

September 12, 2026August 13, 2026 by Bruno
Reddit Joins the S&P 500 on Aug 18: Shares Pop 8.8%

S&P Dow Jones Indices adds Reddit (RDDT) to the S&P 500 effective Aug 18, 2026. Shares jumped 8.8% after-hours as passive funds prepared to buy.

Categories Capital Markets, Market Trend Tags capital markets, index inclusion effect, passive investing, rddt, reddit stock

Explore ECMSource

New here? Begin with our guide to the site, then explore the subjects that match what you want to understand.

  • Start Here
  • Market Education
  • Stock Market
  • Capital Markets
  • Federal Reserve & Rates

Recent Posts

  • Cintas Posts Record $3.01B Q1 Revenue, Raises FY27 Guidance
  • Series I Bonds Explained: Composite Rate, Inflation Math, Tax
  • Cognex to Acquire RealSense in $500M Cash Deal for Robotics
  • McDonald’s Unveils $8.5B Plan and Low-50s Margin Goal
  • Qualified vs. Ordinary Dividends: Tax Rules Explained

About · Editorial Policy · Corrections · Disclaimer · Privacy · Contact

© 2026 Equity Capital Market • Built with GeneratePress