Reddit Stock Surges 12%, Set to Join S&P 500 Index This Month

TradingKey - Reddit (RDDT) is set to reach a major milestone since going public.

S&P Dow Jones Indices announced on August 13 that Reddit will be officially added to the S&P 500 Index before the US market opens on August 18, replacing AvalonBay Communities, which is currently being acquired by Equity Residential.

Following the announcement, Reddit's stock price rose 12.45% in extended trading on Thursday, reflecting a quite positive market reaction to this index adjustment.

Source: Google Finance

For Reddit, joining the S&P 500 not only means gaining greater visibility in capital markets, but may also bring a wave of incremental demand from index funds. Because a large number of passive funds benchmark against the S&P 500, these funds typically need to adjust their holdings synchronously when index components change. Therefore, inclusion in a major benchmark index often brings additional buying interest to the stock.

However, S&P Dow Jones Indices' own research also points out that as market liquidity improves and passive investment mechanisms mature, the traditional "index effect" has weakened in recent years. Therefore, whether this inclusion can translate into sustained stock price support remains to be seen.

This adjustment also further elevates Reddit's position in the social media industry. The company went public on the US stock market in March 2024 and currently has a market capitalization of about $30.4 billion. After entering the S&P 500, Reddit will become one of the few platform companies in the index with social media as its core business, representing this segment alongside Meta Platforms. In contrast, although Pinterest and Snap also listed earlier, they have not yet reached the scale and conditions required for inclusion in the major index.

However, the positive boost from index inclusion has not changed the core issue facing Reddit: whether the company can maintain stable user growth against the backdrop of AI rapidly reshaping how internet traffic is distributed.

The second-quarter results released at the end of July provided positive signals to investors, but the impressive revenue figures did not entirely dispel market concerns. Following the earnings report, Reddit's stock price actually fell by around 12% at one point in extended trading, partly due to management's description of traffic performance.

The company noted that US user growth had slowed and traffic from search engines remained subject to significant volatility. Unstable search referral volumes have also led investors to re-evaluate Reddit's reliance on the Google search ecosystem. In the second quarter, US daily active user growth was just 6%, down from 7% in the previous quarter; meanwhile, international user growth reached 28%, though monetization efficiency for overseas users was noticeably lower than in the US market.

Reddit management had previously linked part of the search traffic pressure to changes in search engine algorithms. As Google continues to push forward with Gemini-powered AI search and AI summary features, the market is concerned that users may increasingly seldom click directly on traditional web links.

Under these circumstances, although Reddit possesses a large amount of high-quality user-generated content with real discussion value, it may face a new paradox: the content itself is becoming increasingly valuable, but users may not necessarily need to access Reddit through traditional search methods.

Notably, as of the close on August 13, Reddit's stock price remains down about 31.9% year-to-date, leaving a significant gap from its peak of over $270 last year.