Cleveland-Cliffs stock (NYSE: CLF) went up 14% in just the last one week, while the stock is up 12% over the last one month. There were a couple of factors that were behind this rally in the stock. The most important one being the commentary on Reddit that there could be a short squeeze in CLF stock. The company's stock was already strong in the last one month due to a rise in iron ore prices. The speculation on Reddit about a short squeeze led to more investors covering their short positions to cut down on losses. The other factors (apart from the short squeeze) were strength in global iron ore prices and the company's update on its plant in Ohio. CLF's recent release said that it is celebrating six months of "continued operation and production of hot-briquetted iron at the Company's state-of-the art Direct Reduction plant in Toledo, Ohio." This announcement has been able to give investors more confidence in the company as it helps ensure it has access to key steelmaking inputs.