S&P 500 changes are due out soon — and this could be a big update

The S&P 500 index committee is expected to announce its quarterly rebalance after Friday's close, with this third-quarter reshuffle anticipated to be particularly significant due to annual float-factor adjustments and historical discretionary changes. Prominent candidates for inclusion, which typically leads to a short-term stock price bump and increased fund attention, include AppLovin, Reddit, Robinhood, and newly eligible Strategy (formerly MicroStrategy). Eligibility requires meeting criteria such as a minimum $22.7 billion market capitalization and recent GAAP profitability across the past four quarters.

Analysis

The upcoming S&P 500 quarterly rebalance is poised to be a significant market event, as the third-quarter reshuffle is historically the largest due to annual constituent float-factor adjustments, which create liquidity for more discretionary changes. While the index committee unexpectedly made no changes last quarter, several high-profile companies now meet the inclusion criteria, which include a market capitalization of at least $22.7 billion and sustained GAAP profitability. AppLovin Corp. (APP) stands out as the largest eligible candidate with a $164 billion market cap. Strategy Inc. (MSTR) is a notable newly eligible candidate, having recently cleared the financial viability hurdle. Other potential additions include Pure Storage (PSTG), which has appreciated 42% in the last month, and semiconductor firm Astera Labs (ALAB). Conversely, Robinhood Markets (HOOD), despite being the third-largest eligible company, faces uncertainty after being passed over previously, with analysts questioning the likelihood of another fintech addition following the recent inclusions of IBKR, Block, and COIN. Inclusion typically forces buying from index-tracking funds, creating a short-term positive catalyst for the selected stocks.

Key Decisions for Investors

• Investors may consider tactical, event-driven positions in strong S&P 500 inclusion candidates like AppLovin (APP) and newly-eligible Strategy (MSTR) ahead of the announcement to potentially capitalize on a price bump from index fund buying.
• Caution is warranted for Robinhood (HOOD), as its previous snubs and the recent addition of other fintech firms to the index suggest a lower probability of inclusion despite meeting the technical criteria.
• Monitor second-tier candidates with strong momentum, such as Pure Storage (PSTG), whose significant 42% stock price increase in the last month makes it a compelling case for a potential promotion from the S&P MidCap 400.
• Given the index committee's discretionary power and the precedent of no changes last quarter, any speculative trades should be sized appropriately to account for the risk that a company may not be selected.