The Advisor's Answer to AI IPO FOMO: Wait for the Index

The initial public offering of SpaceX, followed by pending listings from Anthropic and OpenAI, could bring as much as $4 trillion in market cap to US equities over the next six to 12 months ^[1]. That prospect has some investors rushing into SpaceX and lining up to buy the other two, in effect assembling a private mini-index inside their taxable brokerage accounts and IRAs ^[2].

Several advisors who work with retirement savers are declining to play. They told Retirement Upside they are optimistic about these companies over the long term but cautious about single-stock positions, and most would rather wait until the shares are folded into mainstream indices and diversified sector funds, where a single blowup is diluted by everything else ^[3].

The reasoning is partly about behavior and partly about the tax wrapper. Maria Castillo Dominguez, founder of Valoria Wealth Management, said the fear of missing the early run-up is real but overstated, and that the best long-term returns have historically arrived after a stock joins a key index rather than before it ^[4]. Her sharper point is about where the bet sits: "A bundle of high-profile IPOs in an IRA sounds exciting until three of the five underperform and you've permanently burned tax-advantaged dollars," she said ^[5]. She also flagged the opposite risk, that outsized winners inflate an IRA into large required minimum distributions later, forcing Roth conversions to avoid a higher bracket ^[5].

Andrew Van Alstyne, founder of High Rock Wealth Management, worries about sentiment-driven trading in the early months. When early holders do not see the returns or the earnings they expected, he said, "you're going to see a lot of people running for the hills," and he would rather sit on the sideline until there is a clearer time to add the names ^[6].

The historical base rate is not encouraging for the impatient. Economist Jay Ritter's 1991 study found IPOs returned 34.5% over their first three years while comparable companies returned 61.9% ^[7], a gap of 27.4 percentage points against the new issues ^[8]. The worst outcomes clustered among young growth companies that went public in hot markets ^[9], which is a fair description of this cohort.

Not everyone counsels abstinence. Thomas Rindahl of TruWest Wealth Management argued that a 1% or 2% position will not alter a retirement if it goes to zero, but could matter meaningfully if one of the names compounds 10x or 100x ^[10].

What to watch is the index math. The practical question for savers is not whether these companies succeed but when they clear the inclusion standards for benchmarks like the S&P 500 ^[11], because that is the point at which a diversified fund does the buying for them.