5 Best Sectors to Watch This Week

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This week, the aerospace and defense, biotechnology, life science, auto parts and e-commerce sectors are gathering momentum on the Portfolio Grader database.

Aerospace and defense is thriving this week with 74% of stocks in the sector (31 out of 42) currently rating a “buy”. Out of the aerospace and defense stocks, Alliant Techsystem (), Huntington Ingalls Industries, Inc. () and TASER International, Inc. () are out front with A’s. The best performer in this sector is Huntington Ingalls Industries, Inc., which saw its price jump up 218.2% in the last 12 months.

The biotechnology sector is thriving on Portfolio Grader this week, with 71% of its stocks (59 out of 83) currently rating a “buy”. Among biotechnology stocks, Gentium S.p.A. Sponsored ADR (), Repligen Corporation () and Insys Therapeutics, Inc. () are leading the way with A’s. Over the last 12 months, Insys Therapeutics, Inc. is the best performer in this sector, with a 608.2% increase.

Life science is excelling, with 70% of stocks in the sector (16 out of 23) rating a “buy”. Wuxi PharmaTech (Cayman) Inc. Sponsored ADR (), Covance () and Illumina, Inc. () are paving the way for the sector with A grades. Wuxi PharmaTech (Cayman) Inc. Sponsored ADR is the best performer in this sector, with a 256.8% increase in the last 12 months.

With 68% of the sector’s stocks (17 out of 25) rating a “buy,” the auto parts sector is one of the strongest. Magna International (), Dorman Products, Inc. () and Cooper-Standard Holdings Inc. () are lifting the sector overall, each earning a high grade of A. Showing the most overall growth in its sector in the last 12 months, Magna International is the top stock, with a 181.1% increase.

The e-commerce sector’s track record is proving one of the best with 65% of its stocks (11 out of 17) rating a “buy”. priceline.com Incorporated (), Liberty Interactive Corporation Ventures Series A () and Vipshop Holdings Ltd. Sponsored ADR () are all currently earning A’s. Vipshop Holdings Ltd. Sponsored ADR is performing the best overall in the sector, with a 2287.6% increase from 12 months ago.

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.