A.M. Update
S&P futures are near unchanged, giving up about a half-percent pre-market gain as the Q1 earnings reporting season begins in earnest. JPMorgan ChaseĀ (JPM -3%) is continuing that rough patch after missing EPS estimates, while BlackRockĀ (BLK +0.1%) and First Republic BankĀ (FRC+0.6%) are up modestly in pre-market action after beating EPS estimates. On the economy, JPMorgan CEO…