bennymarty/iStock Editorial via Getty ImagesThis article explores real estate investment trusts (REITs), with particular emphasis on Park Hotels and Resorts Inc. (NYSE:PK), an asset that has surged by more than 25% since we last covered it in October.  Pearl Gray's Past PK Ratings (Seeking Alpha)Our basis for assigning a buy rating in October was Park Hotels & Resorts' operational prowess and PK REIT's valuation. However, various events have occurred since our latest coverage, prompting us to revisit Pa ...