Mag 7 Divergence: Your Portfolio's Hidden Risk
The Magnificent Seven lost $4.2 trillion in combined market cap from their 52-week highs — but the selloff hasn't been equal. Microsoft sits 29% below its peak while Alphabet is down just 13%. That 16-percentage-point spread tells you something the "Mag 7" label obscures: these stocks are no longer moving as a bloc, and treating them as one trade is a mistake. With a combined market capitalisation still near $19.9 trillion, the seven largest tech names dominate index construction like nothing since the Nifty Fifty era of the early 1970s. Investors who own the [S&P 500](/posts/2026-03-14/sp-500-hits-2026-low-as-selloff-deepens) through a passive fund already have roughly 30-35% of their portfolio in these names. The question isn't whether you own them — you almost certainly do — but whether you understand the concentration risk that comes with the divergence now playing out.