A Wealth Manager Just Made a Case Against Owning Real Estate ETFs

A 5% allocation to real estate might seem like prudent diversification. Thomas Brock, CFA and CPA, would disagree — not because the asset class lacks merit, but because it’s already there. When a portfolio holds 80% in global stocks, as Brock recommends for a 40-year-old investor, it already includes real estate. Companies in the S&P 500, MSCI World, and other broad indexes own property, malls, and offices. Their performance reflects real estate value. A dedicated REIT fund like VNQ doesn’t add new exposure. It adds cost and overlap. Brock’s review of ChatGPT’s proposed portfolio cut the 5% real estate allocation entirely. His reasoning was structural: if the stock portion spans the global market, then real estate is already priced in. The need for a separate allocation dissolves. This reframes REITs not as diversifiers, but as sector bets — concentrated, fee-bearing, and redundant when core holdings already span the economy. For investors, the implication is direct: diversification isn’t about checking asset class boxes. It’s about ensuring exposure without duplication. And if your stock funds already own the buildings, buying the real estate trust is just repackaging what you already hold.