Which Stock Should Be Added To S&P 500 Next? Stocktwits Users Favor Robinhood Over Reddit, AppLovin, Carvana

Robinhood has seen its share price surge by over 150% so far this year, benefiting from new features, strong operational metrics and the prospects of inorganic growth.
In this photo illustration, the US stock market index tracking the stock performance of 500 large companies listed S&P 500 logo is seen displayed on a smartphone.
In this photo illustration, the US stock market index tracking the stock performance of 500 large companies listed S&P 500 logo is seen displayed on a smartphone. (Photo Illustration by Budrul Chukrut/SOPA Images/LightRocket via Getty Images)
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Shanthi M·Stocktwits
Published Jul 07, 2025 | 5:35 AM GMT-04
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Datadog (DDOG) will be the next company to be added to the broader S&P 500 Index following Juniper Network’s acquisition by Hewlett-Packard Enterprises (HPE). 

The announcement from index compiler S&P Dow Jones regarding the inclusion, which is said to take effect before the market opens on July 9, sent Datadog stock up by about 15% on Thursday.  

The rally was also partly aided by the broader market strength seen in the session following a stronger-than-expected June non-farm payrolls report. 

Against the backdrop, Stocktwits asked its users, “Which stock should be the next addition to the S&P 500?” The ongoing poll has received responses from 4,300 users so far. 

The overwhelming preference of the retail community was Robinhood Markets, Inc. (HOOD) (61%). The retail trading app offers commission-free trading for its users and allows trading in a diverse range of financial instruments, including stocks, exchange-traded funds (ETFs), and cryptocurrencies. 

Menlo Park, California-based Robinhood has seen its share surge by over 150% so far this year, benefiting from new features, strong operational metrics, and the prospects of inorganic growth.

Robinhood stock breached the $100 psychological barrier on an intraday basis for the first time last Wednesday but has since then come off this mark.

The next favorite among Stocktwits users was the community-based social media platform Reddit, Inc. (RDDT) (16%), followed by AppLovin Corp. (APP) (13%) and Tempe. Arizona-based used car retailer Carvana, Inc. (CVNA) (10%). 

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Reddit stock has had a volatile year, trading in the $79.75-$230.41 range. The stock is down about 4%, underperforming the broader market.

AppLovin stock is up about 6% despite the App marketing platform coming under attack from short sellers for misrepresenting key operational metrics.

Meanwhile, Carvana stock, although considered a speculative bet, has added over 70% this year. The positive sentiment can be traced back to a solid first-quarter report it released in early May.

The S&P 500 Index, a market-cap-weighted index, is considered the best single measure of large-cap U.S. equities, comprising 500 leading companies that collectively cover approximately 80% of the total market capitalization. The eligibility criteria for addition to the index include a market cap of $22.7 billion or more.

Index inclusion typically generates positive sentiment toward the stock, as investors view it as a validation of the company’s credentials as a stable and growing entity. Also, funds tracking a particular index would load up on the stock to align their portfolio weighting with that of the index.

For updates and corrections, email newsroom[at]stocktwits[dot]com.

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