> Citigroup’s Mr. Suva forgot to hedge. He put a 40% chance on Apple buying Netflix, but also a 25% chance Apple buys Walt Disney Co., a 10% chance each it buys one of three videogame makers, and a 5% chance it buys Tesla Inc. That sums to 100%, implying it is mathematically certain Apple buys one of them.
WSJ math failure:
> Citigroup’s Mr. Suva forgot to hedge. He put a 40% chance on Apple buying Netflix, but also a 25% chance Apple buys Walt Disney Co., a 10% chance each it buys one of three videogame makers, and a 5% chance it buys Tesla Inc. That sums to 100%, implying it is mathematically certain Apple buys one of them.