There’s a fight brewing in the lithium market, after a controversial forecast from Goldman Sachs Group analysts set off a backlash among some of the industry’s most prominent experts.

Lithium is a vital component of electric-vehicle batteries, which means the outlook for supply, demand and pricing is increasingly consequential. For years, a small group of niche consultants has dominated the conversation in a commodity that some say will become as important as oil in the coming century. Now, with prices surging and demand booming, they’re increasingly sharing the stage with Wall Street titans like Goldman.

The bank made headlines when it warned that a searing rally in lithium will go into reverse this year as supply from unconventional new sources overwhelms demand. Credit Suisse Group also joined in predicting a correction. But specialists including London-based Benchmark Mineral Intelligence are loudly pushing back.