Source

MarketWatch / Dow Jones article, surfaced through Morningstar, framing the retirement-account exposure concern: passive index products may have to buy $SPCX after index methodology changes let mega-cap IPOs enter sooner than traditional seasoning windows. This is useful as a narrative receipt for the 401(k) / passive-investor concern.

Source grade: secondary. Do not cite it for the exact mechanics. Use the same-day Nasdaq and S&P primary captures for methodology:

• 2026-06-02-nasdaq-ndx-fast-entry-methodology
• 2026-06-02-s-p-dji-megacap-consultation

Routed to parent thread . $SPCX is the first case study; OpenAI and Anthropic remain separate future child cases.