Reddit Stock Pops 11% on S&P 500 Inclusion Despite Google AI Traffic Concerns

Reddit shares surged 11% in prolonged buying and selling Thursday after S&P Dow Jones Indices confirmed the platform will be part of the S&P 500.

Reddit is barely the second pureplay social media inventory within the benchmark index after Meta.

Reddit’s Index Debut, By the Numbers

S&P Dow Jones Indices said Reddit (RDDT) will exchange AvalonBay Communities within the S&P 500 earlier than buying and selling opens on Aug. 18, 2026, as soon as Equity Residential completes its acquisition of AvalonBay.

Reddit shares climbed to $175.38 in postmarket buying and selling following the information, up from Thursday’s $153.12 shut, a achieve of practically 11%, in accordance with TradingView information.

Index funds that observe the S&P 500 should now purchase Reddit shares to match the benchmark, a mechanical demand shock that helps clarify jumps like this even absent contemporary enterprise information.

The similar announcement added Sun Communities to the S&P MidCap 400 efficient Aug. 20, changing Webster Financial as Banco Santander’s acquisition of Webster nears completion.

Reddit’s addition leaves Meta as the one two pureplay social platforms within the S&P 500. Pinterest and Snap each went public earlier however stay too small by market cap for inclusion, and Twitter exited the index as soon as Elon Musk acquired the corporate and rebranded it X beneath SpaceX.

A Rally That Follows a Rough Earnings Reaction

Thursday’s pop arrives lower than three weeks after Reddit’s second quarter results cut up buyers. The firm posted its eighth straight quarter of income progress above 60%, but shares initially bought off after CEO Steve Huffman flagged uncertainty round Reddit’s dependence on Google for brand spanking new customers.

“Search referrals had been uneven within the quarter, and site visitors was extra risky later within the quarter.”

Steve Huffman, in a letter to Reddit buyers

Huffman tied the volatility to Google’s rising use of Gemini-powered AI Overviews, which reply search queries immediately on the outcomes web page as a substitute of routing customers to websites like Reddit. The concern will not be distinctive to Reddit. AI-generated search summaries are reshaping how publishers and crypto tasks compete for visibility on-line.

S&P 500 membership doesn’t resolve that structural query. It does assure Reddit a brand new base of consumers uninterested within the AI-traffic debate, since index funds should now merely maintain the inventory.

Reddit joins a brief record of once-fringe web corporations utilizing S&P inclusion to cement mainstream investor legitimacy. Coinbase joined the index in 2025, a milestone Strategy has not achieved regardless of its dimension.

Whether Reddit’s search-traffic danger resurfaces as soon as the passive-buying wave settles is the open query heading into Aug. 18.

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