Logo of Vale S.A. on a smartphone. (Photo Illustration by Pavlo Gonchar/SOPA Images/LightRocket via ... More Getty Images)SOPA Images/LightRocket via Getty Images Vale (NYSE:VALE) stock has not performed particularly well this year, increasing by approximately 10% year to date. In comparison, competitor ArcelorMittal (NYSE:MT) experienced a 36% rise, and United States Steel stock (NYSE:X) saw an increase of 26% during the same timeframe. So what is going on with VALE, and what trends might influence the com ...