Save for later Print Download Share LinkedIn Twitter Daily Differentials Apr 26 Apr 27 Apr 28 Apr 29 Apr 30 NY-HH -0.24 -0.42 -0.56 -- -0.89 Chicago-HH -0.08 -0.07 -0.15 -0.13 -0.23 CHIC-AECO 0.42 0.49 0.44 0.45 0.39 PG&E-AECO 1.85 1.90 1.68 1.65 1.59