Why is DEG priced weaker than MEG despite shared feedstock and tight port stocks?

Why is DEG priced weaker than MEG despite shared feedstock and tight port stocks?
DEG has repeatedly tracked MEG lower rather than finding its own footing. When MEG and styrene slumped, DEG followed the broader complex down, with East China prices hovering near the 5,000 yuan/t mark and sentiment almost uniformly bearish. The key point is that DEG's own supply-demand balance was not under heavy pressure; the weakness was imported from the wider chain. Port inventories above 70,000 tonnes kept a lid on any rebound, and destocking through the year ran slower than expected. Buyers should treat DEG as a follower grade: watch MEG futures and styrene for direction, and expect DEG to lag rather than lead any recovery.