Dow Jones futures rose slightly overnight, while S&P 500 futures and Nasdaq futures fell. Arm Holdings (ARM), Coherent (COHR) and Albemarle (ALB) were key earnings movers The stock market rallied strongly Wednesday on Iran deal hopes and generally strong earnings. The S&P 500, Nasdaq and small-cap Russell 2000 all hit new highs. Advanced Micro Devices (AMD) soared on earnings, while…