Lost count on the margin increases at CME (NYM) last one if I recall in effect last Friday, impacts things.
old new increase
NY-NG 1 Dec18 4,700 5,700 1,000
NY-NG 2 Jan19 4,675 5,675 1,000
NY-NG 3 Feb19 4,600 5,600 1,000
NY-NG 4 Mar19 4,450 5,450 1,000
NY-NG 5 Apr19 1,900 1,900 0