According to Eric Balchunas, several major stocks such as Microsoft (MSFT) and Tesla (TSLA) had their S&P 500 admissions delayed by the Index Committee, and he calls for a comprehensive list of all such delayed entrants for analysis; source: Eric Balchunas, X, Sep 5, 2025. According to Eric Balchunas, he proposes constructing a backtest basket of these delayed entrants and comparing its historical performance against SPX to evaluate any index-inclusion delay effects that could be trade-relevant; source: Eric Balchunas, X, Sep 5, 2025. According to Eric Balchunas, the post does not provide performance results or discuss cryptocurrency market implications; source: Eric Balchunas, X, Sep 5, 2025.