Ethane Goes Crazy – What’s Behind the Ethane-to-Gas Ratio Spike?

In just over a month, the price of Mont Belvieu purity ethane doubled, from 19 c/gal to 39 c/gal on Friday. Sure, the price of natural gas was up about 15% over the same period. But that increase was nowhere near ethane’s, so it was certainly not the price of gas that was making ethane take off. In fact, with ethane rocketing into space and gas prices still in the dumper, the ethane-to-gas ratio — a key measure of the value of ethane — skyrocketed, soaring from 1.2X in mid-June to 2.2X on Friday. A ratio at this level has only happened twice before in the past decade: once in 2018 due to a collision between fractionation capacity and new petchem plants coming online, and then again in 2020 during the COVID petchem demand surge. But the most recent price surge didn’t last long. On Tuesday ethane came back to earth, crashing 22% in a single day, and the ethane-to-gas ratio deflated down to 1.6X. So what’s happening? There are a lot of conspiracy theories out there that we won’t repeat here. Instead, in today’s RBN blog, we’ll lay out what we think are the most likely contributing factors behind this wild ride.

That crazy little ethane molecule is at it again. Yesterday the price blasted to 67.875 c/gal, a level last seen on January 17, 2012. Petchem cracker margins are low. Production is up, but inventories are down. A big driver of the bedlam is the price of natural gas, trading in the $7-$9/MMBtu range for the past month. But as usual with ethane, there’s a lot more happening below the surface — including high domestic demand, growing export volumes, and significant developments in downstream petrochemical markets — all shaking things up. Looking ahead, uncertainty looms, with more export capacity, ever-changing ethane rejection economics, and uneven production growth. In today’s RBN blog, we’ll leap back into the ethane market to see what’s been going on, and where ethane is headed over the next few years.

The last couple of years have been a wild ride for the U.S. ethane market, but look out ahead.  It’s going to get crazy. The onslaught of new, ethane-only crackers is upon us at the same time overseas exports are expected to ramp up. At first glance, it might appear there is enough ethane to meet all that demand, coming from molecules that today are being rejected — that is, sold as natural gas rather than liquid ethane. But the big question — will it be enough? Because not all that rejected ethane has access to pipeline capacity needed to get it to market, at least not right now. In today's blog, we begin a new series on rising ethane demand, how the new demand will be met, and what it all means for ethane prices.