Mega IPOs Risk Tech Concentration Past Bubbles; Meta IPO Was Inconsequential
Bank of America strategist Hartnett warned mega-IPOs risk pushing tech weighting past bubble levels, with technology representing over 44% of the S&P 500 and poised to exceed 48% concentration. He noted major offerings including Meta Platforms’ IPO had minimal market impact, with equities sometimes falling 9-12 months after high-profile debuts.
1. Mega-IPO Concentration Risk
Hartnett warned that a wave of mega-IPOs, including from SpaceX and OpenAI, could push technology’s share in equity benchmarks beyond 48%, surpassing bubble-era levels seen in the roaring ’20s and tech booms of the ’90s. He noted tech already accounts for over 44% of the S&P 500.
2. Meta Platforms’ IPO Impact
Reviewing past major public offerings, he cited Meta Platforms’ IPO as an example of a high-profile debut that produced negligible market impact, with broader indices sometimes slipping 9-12 months after such events.
3. Indicators and Market Risks
He identified rising bond yields as a key bubble end signal and pointed to ETF movements in biotech and retail sectors as gauges of shifting investor sentiment, warning that extreme bullishness may prelude a broader pullback.