This week, 4 Internet & Catalog Retail stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Ctrip.com International Ltd. Sponsored ADR (CTRP) boosts its rating from a B to a A this week. Ctrip.com International Ltd. Sponsored ADR provides travel services for hotel accommodations, airline tickets, and packaged tours in the People’s Republic of China. The company also gets A’s in sales growth, operating margin growth, earnings growth, earnings revisions, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of CTRP stock.

Shutterfly, Inc. (SFLY) is seeing ratings go up from a C last week to a B this week. Shutterfly, Inc. is an Internet-based social expression and personal publishing service that enables consumers to share, print and preserve their memories by leveraging its technology, manufacturing, web-design and merchandising capabilities. The company also gets A’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of SFLY stock.

Liberty TripAdvisor Holdings Inc Class A’s (LTRPA) ratings are looking better this week, moving up to a B from last week’s C. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of LTRPA stock.

The rating of JD.com, Inc. Sponsored ADR Class A (JD) moves up this week, rising from a C to a B. The company also gets A’s in sales growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of JD 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.