If the stock market is sputtering, it's not because of earnings. S&P 500 earnings per share are on pace to climb more than 50% in the second quarter. Combining reported and yet-to-be-reported results, S&P 500 earnings are up 50.4%, according to the most recent data from FactSet. That's the best quarter since Q2 of 2021, when profits surged 91.6% in…