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

ملخص مفصل

He bought an S&P 500 index fund to avoid betting on any single AI winner. One quirk in how the fund lists its holdings means he may be carrying far more risk in one company than he realizes.

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.

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.

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

For many Americans, funding a 401(k) only leads to more retirement questions. Should you roll your 401k into an IRA, and when? What's the tax impact if the rollover check gets made out to the wrong name? When do required withdrawals begin, and how much do you have to take?

Say both share classes fall 20% and every other holding stays flat. His account would lose about $2,076, or roughly 1% of his balance, because of one company.

Alphabet has already come close to that kind of drop. Its Class A shares fell from about $353 on October 12 to $299 on November 12, a slide of roughly 15% in one month. The stock's 52-week high was nearly $409.

An equal-weight fund produces a very different number. In the July 31 filing for the Invesco S&P 500 Equal Weight ETF (NYSEARCA:RSP), the two Alphabet classes together made up about 0.19% of assets.

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