Jim Cramer Warns About NioCorp (NB)’s High Share Price Gains

Core Insights - NioCorp Developments Ltd (NASDAQ:NB) has seen a significant share price increase of 538% year-to-date, driven by global supply restrictions from China on rare earth metals [2] - The company is focused on producing scandium and niobium, with its Elk Creek project aiming to mine these metals along with titanium from a single ore [2] - Jim Cramer has advised viewers to consider selling NioCorp shares due to the high price gains, suggesting that the current valuation may not be sustainable [3] Company Overview - NioCorp Developments Ltd is an American rare earth metal company that has experienced substantial growth in its stock price in 2025 [2] - The firm is currently developing its Elk Creek project, which is expected to be a significant source of scandium, niobium, and titanium [2] Market Context - The surge in NioCorp's share price is part of a broader trend among rare earth metal companies, largely influenced by China's restrictions on the global supply of these metals [2] - Cramer highlighted concerns about the sustainability of such high valuations in the rare earth sector, referencing historical parallels to past market behaviors [3]