I grant Valero Energy ( VLO ) a hold rating. I am of the opinion that there are no substantial grounds to believe that the company will generate significant value for itsDaniel Mellado is an economist from Carabobo University with a Master's Degree in Statistics from Simon Bolivar University, both obtained in Venezuela.Daniel worked analyzing the agricultural commodity market and the financial investment portfolio for an agribusiness group. Then, he managed two teams, one in trading and the other in data an ...