Block is the latest to get an S&P 500 nod, and its stock is climbing

Block Inc. (SQ) is set to join the S&P 500 index, replacing Hess Corp. (HES) effective before Wednesday's open following Hess's acquisition by Chevron. This inclusion, which saw Block's stock surge over 9% in after-hours trading, mandates index-tracking funds to acquire its shares, potentially enhancing liquidity and market visibility, though historical trends suggest post-inclusion stock performance often flattens after six months. Notably, Robinhood Markets Inc. (HOOD) was once again overlooked for inclusion despite prior speculation.

Analysis

Block Inc. (SQ) is set to join the S&P 500 index before Wednesday's open, replacing Hess Corp. following its acquisition by Chevron. This inclusion, which fulfills a key requirement met in the first quarter of 2024, triggered a significant positive market reaction, with Block's stock climbing over 9% in after-hours trading. The primary driver for this immediate appreciation is the mandatory buying from passive index funds that must replicate the S&P 500's composition. However, historical analysis from Bernstein suggests this outperformance may be short-lived; while stocks typically beat the index in the year leading up to inclusion, relative returns tend to flatten approximately six months post-announcement. The decision is also notable as the S&P Dow Jones Indices committee selected Block, with its nearly $44 billion market capitalization, over the much larger Robinhood Markets Inc., which is approaching a $100 billion market cap and was considered a strong contender by some investors. This bypass contributed to a fractional decline in Robinhood's (HOOD) stock during the extended session, highlighting the discretionary nature of the index committee's selection process beyond pure quantitative metrics.

Key Decisions for Investors

• Investors should anticipate continued near-term upward price momentum for Block (SQ) driven by forced buying from index-tracking funds leading up to its inclusion date, but should temper long-term expectations as historical data shows such post-inclusion rallies tend to neutralize after six months.
• The exclusion of Robinhood (HOOD) despite its larger market capitalization signals a potential qualitative concern from the index committee, warranting caution for investors positioned for a near-term inclusion catalyst.
• Traders may consider capturing the short-term premium on SQ, but long-term holders should monitor whether the enhanced visibility and institutional ownership from inclusion translate into fundamental business improvements that can sustain the valuation beyond the initial technical tailwind.