Goldman Sachs, Wells Fargo and Citigroup reported third-quarter earnings on October 13, 2026, posting a combined $32 billion profit, up 14% from a year earlier. The discussion has widened well beyond that beat: JPMorgan guided full-year net interest income to $106 billion to $107 billion and moved to block AI agents like Muse from customer accounts, while Morgan Stanley reported $232 billion in net new assets, more than double the $111 billion analysts expected. Executives flagged a marked slowdown in dealmaking in the last weeks of September even as European IPO activity runs up about 35% in count and 28% in proceeds year to date. The big six US banks' combined profitability has grown from $86 billion a decade ago…