He Thinks His $200,000 S&P 500 401(k) Spreads His AI Risk. Two Alphabet Share Classes Put $10,380 in One Company. A 20% Drop Could Cost Him $2,076

Quick Read

• S&P 500 funds list GOOGL and GOOG separately, hiding a combined 5% stake in Alphabet that exposes a $200,000 account to about $10,000 of single-company risk.

• Alphabet’s third-quarter capital spending jumped 114% to $51 billion, pushing free cash flow negative, so AI-driven swings now matter more to retirement balances.

• Equal-weight funds cut Alphabet exposure to roughly 0.2%, and rebalancing inside a 401(k) trims concentration without triggering taxes.

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Consider a hypothetical 58-year-old with $200,000 of his 401(k) in an S&P 500 index fund. He figures every company is a thin piece of his savings and that no single AI stock can do much damage. The October 22 holdings that State Street published for the SPDR S&P 500 ETF Trust (NYSEARCA:SPY) show something he missed: Alphabet (NASDAQ:GOOGL) is listed twice.

Why Alphabet Holds Two Seats in Your Index Fund

Alphabet has two share classes that trade publicly. Class A shares (GOOGL) carry voting rights. Alphabet Class C (NASDAQ:GOOG) has none. Class B is held by insiders and does not trade publicly. The S&P 500 weights stocks by market value, and it gives each public class its own position.

The October 22 report put Class A at 2.88% of the fund and Class C at 2.31%. Together, that’s 5.19% riding on one management team, one balance sheet and one capital spending plan.

This was already true earlier in the year. SPY’s March fact sheet listed the two classes at 3% and 2%. Because the classes appear on separate lines of a holdings screen, the combined stake is easy to miss.

A 20% Drop in One Stock Takes $2,076 From His Account

At a combined 5.19% weight, $10,380 of his $200,000 is tied to Alphabet.

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