This week, the overall grades of three restaurant and resort stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Noodles & Co. Class A’s (NDLS) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. As of Dec. 24, 2014, 10.1% of outstanding Noodles & Co. Class A shares were held short. The stock currently has a trailing PE Ratio of 77.80. For more information, get Portfolio Grader’s complete analysis of NDLS stock.

Slipping from a C to a D rating, 500.com Limited (WBAI) takes a hit this week. The stock also gets an F in Earnings Momentum. As of Dec. 24, 2014, 12.1% of outstanding 500.com Limited shares were held short. To get an in-depth look at WBAI, get Portfolio Grader’s complete analysis of WBAI stock.

China Lodging Group Ltd. Sponsored ADR (HTHT) gets weaker ratings this week as last week’s C drops to a D. China Lodging Group is an economy hotel chain in China. Trade volume is up 582% from the previous week. The stock has a trailing PE Ratio of 29.00. For more information, get Portfolio Grader’s complete analysis of HTHT 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.