Are surging corporate profits sustainable beyond temporary tariff benefits?
Core argument: Forward guidance turned decisively positive in Q3, with S&P 500 companies raising profit outlooks over lowering them by nearly 2-to-1—a full reversal from the negative guidance trend of a year earlier.
Across S&P 500 companies, per-share earnings soared 53% in the second quarter from a year earlier, while sales rose nearly 16%. Investment gains from tech giants Amazon and Alphabet added fuel to the big earnings surge. Even without those gains, S&P 500 earnings rose the most since fall 2021. By a nearly 2-to-1 margin, more companies raised their profit guidance for the current quarter than lowered it—a turnaround from a year ago, when more were lowering their outlooks. Tariff refunds are providing a big, temporary tailwind. They are likely to account for more than 4% of third-quarter economic growth—or add about 0.2 percentage point to the Atlanta Fed’s growth forecast of between 4% and 5%—according to a mid-August estimate from Apollo.

