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Reddit shares jump 11% as it joins the S&P 500 on August 18

Market News
13 Aug 2026
CNBC
View Source
Bullish
pluang ai news

Reddit's shares surged 11% in after-hours trading following the announcement that the social media company will join the S&P 500 index on August 18. Reddit will replace AvalonBay Communities Inc. in the benchmark, becoming only the second pure social media company in the index after Meta. This inclusion often leads to stock price increases as index-tracking funds buy shares to match the new composition. The move highlights Reddit's growing market presence alongside other social media firms like Meta, Pinterest, and Snap.

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Reddit to join S&P 500, but history warns gains may fade after initial pop

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