According to @KobeissiLetter, Nvidia (NVDA) has averaged an 8% share of the S&P 500’s market cap in 2025, the highest percentage of any company in the index this year, source: @KobeissiLetter. According to @KobeissiLetter, NVDA has surpassed Apple (AAPL), which led the index by market weight for the previous six consecutive years, source: @KobeissiLetter. According to @KobeissiLetter, NVDA’s current market weight is the largest for any single company since 1974, source: @KobeissiLetter. According to @KobeissiLetter, historical leaders included IBM (IBM) dominating for 15 years in the 1970s–1980s and General Motors (GM) leading for 18 years during the 1950s–1970s, source: @KobeissiLetter. In a free-float market-cap-weighted S&P 500, an 8% NVDA weight mechanically implies similar proportional exposure for index-tracking funds, concentrating performance attribution in NVDA for broad-market portfolios, source: S&P Dow Jones Indices.

According to @EricBalchunas, Bloomberg’s ETF IQ is scheduled today at 12:30 pm to debate index top-heaviness, shiny objects, IBIT holders, and financial engineering, with a Vanguard segment on VGHY, and it can be streamed via Bloomberg Live US at bloomberg.com/live/us, source: @EricBalchunas. For crypto-focused traders, the explicit inclusion of IBIT holders makes this directly relevant to Bitcoin ETF positioning and BTC-linked exposure, source: @EricBalchunas. For cross-asset traders, the VGHY segment flags a discussion on high-yield ETF dynamics that are pertinent to credit risk sentiment and liquidity conditions, source: @EricBalchunas.

According to @stocktalkweekly, the seven most valuable companies globally are all American for the first time in over 20 years, after Broadcom surpassed Saudi Aramco this year (source: @stocktalkweekly, Sep 14, 2025). The source highlights Broadcom’s climb past Saudi Aramco as the catalyst for the shift in the global market-cap leaderboard (source: @stocktalkweekly, Sep 14, 2025). No crypto-specific impacts were provided by the source (source: @stocktalkweekly, Sep 14, 2025).