The Mont Belvieu, Texas, ethane price broke through 30 cents per gallon (gal) last week for the first time since March 2014—a 51-month stretch. The ethane margin at Mont Belvieu rose 29.22%, sailing past 11 cents/gal.

Overall NGL prices were static, with the hypothetical Mont Belvieu barrel slipping 36 cents to $34.34.

Mont Belvieu ethane has rallied for the last month, climbing 24.2% while the barrel is up only 1.6%. Will it last?