Accounting rules require holdings such as stakes in other companies to be carried at their latest valuation, and the change flows through net income. That makes reported profit move with the price someone else set in the most recent funding round or market close, and it cuts both ways: a lower valuation writes the same amount back out.
Awaiting gradingThe S&P 500's Record 15.7% Margin Drops to 14.4% Without AlphabetCheck after Microsoft, Meta, Amazon and Apple report Q2 results whether their margins improved similarly, that determines whether 15.7% reflects a broad AI boom or an Alphabet-sized illusion.