The S&P 500's Magnificent-7 might be less magnificent in 2026 as their fierce competition in the AI race starts to erode the monopolies they have enjoyed in search (Google), software (Microsoft), retailing (Amazon), advertising (Meta), electric vehicles (Tesla), smartphones (Apple), and GPU chips (Nvidia). The beneficiaries of that competition are likely to be the S&P 500's Impressive 493. A week ago, we recommended underweighting the former and overweighting the latter. We may be on the right track: Since October 29, the MAGS ETF is down 4.2%, while the XMAG ETF is up 1.2% (chart).