The ratings of four restaurant and resort stocks are down this week, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, Noodles & Co. Class A (NDLS) falls to a D (“sell”), worse than last week’s grade of C (“hold”). As of Aug. 13, 2015, 12.3% of outstanding Noodles & Co. Class A shares were held short. For more information, get Portfolio Grader’s complete analysis of NDLS stock.

Wynn Resorts, Limited (WYNN) ratings are on the decline this week as the company earns an F (“strong sell”). Last week, it received a D (“sell”). Wynn Resorts owns and operates destination casino resorts. The stock gets F’s in Earnings Revisions and Earnings Surprise. To get an in-depth look at WYNN, get Portfolio Grader’s complete analysis of WYNN stock.

This is a rough week for MGM Resorts (MGM). The company’s rating falls to F from the previous week’s D. MGM Resorts International operates gaming, hospitality and entertainment resorts. The stock gets F’s in Earnings Momentum, Earnings Revisions and Earnings Surprise. For more information, get Portfolio Grader’s complete analysis of MGM stock.

Las Vegas Sands (LVS) earns an F this week, moving down from last week’s grade of D. Las Vegas Sands owns and operates casino resorts and convention centers. The stock also gets an F in Earnings Revisions. To get an in-depth look at LVS, get Portfolio Grader’s complete analysis of LVS stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.