NEW YORK (TheStreet) -- Shares of Glencore (GLNCY) are being hammered on Monday, down nearly 26%. This relentless selling may come as little surprise by now because the Swiss commodity giant is now down 77% on the year. 

A negative research report from Investec suggests the company's equity could be worthless if commodity prices don't rebound. Shares hit new all-time lows in the session. 

This is a stock that many investors know very little about because it is a foreign entity, TheStreet's Jim Cramer, co-manager of the Action Alerts PLUS portfolio, said on CNBC's "Mad Dash" segment. It is one of three companies Cramer warned investors about last week.


Glencore GLNCY data by YCharts

Image placeholder title

The company's bonds are getting crushed, too, Cramer pointed out. With the bonds down so much, it's no surprise the stock is also getting hit hard on Monday. 

This is a very large company that investors should keep an eye on. While it won't cause a financial crisis like the one seen in 2008, it could cause a brief selloff in the stock market if the situation worsens, Cramer said. 

At the time of publication, Cramer's Action Alerts PLUS had no position in stocks mentioned.