Top Day Trader Alerts (ALKS, LLY, SNY, MRK, SPPI, LXK, BSX, JDAS, IDIX, PKG, CVBF, WERN)

By Douglas A. McIntyre Updated Jul 21, 11:59AM EDT · Published Jul 21, 7:40AM EDT

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These are some of this morning’s top stocks to watch for active trading today based on pre-market and after-hours volume activity. There are links through to more detailed coverage and volume analysis at VSInvestor.com:

Alkermes Inc. (Nasdaq: ALKS) shares are ones to watch for volume upside following positive study results that may also affect shares of Eli Lilly & Co. (NYSE: LLY) and Sanofi Aventis (NYSE: SNY).

Merck & Co. (NYSE: MRK) shares are up over 3% after it beat EPS by 6 cents a share and reaffirmed fiscal 2009 guidance.

Spectrum Pharmaceuticals Inc. (Nasdaq: SPPI) shares are rising in premarket trade after getting FDA fast-track status for a bladder cancer candidate.

Lexmark International Group Inc. (NYSE: LXK) shares are ones to watch for volume downside after it missed expectations by 5 cents a share and guided Q3 EPS lower.

JDA Software Group Inc. (Nasdaq: JDAS) are ones to watch for volume upside after it posted a 17-cent a share EPS beat.

Idenix Pharmaceuticals Inc. (Nasdaq: IDIX) shares are ones to watch for volume downside after it missed EPS expectations by 3 cents a share.

Packaging Corp. of America (NYSE: PKG) shares are ones to watch for volume upside following a 12-cent EPS beat.

Boston Scientific (NYSE: BSX) is up strongly in early premarket trade on stronger-than-expected earnings.

CVB Financial Corp. (Nasdaq: CVBF) shares are ones to watch for downside after it announced a stock offering.

Werner Enterprises Inc. (Nasdaq: WERN) are ones to watch for volume downside on concerns about a revenue miss.

-The 24/7 Wall St. Team

About the Author Douglas A. McIntyre →

Douglas A. McIntyre is the co-founder, chief executive officer and editor in chief of 24/7 Wall St. and 24/7 Tempo. He has held these jobs since 2006.

McIntyre has written thousands of articles for 24/7 Wall St. He is an expert on corporate finance, the automotive industry, media companies and international finance. He has edited articles on national demographics, sports, personal income and travel.

His work has been quoted or mentioned in The New York Times, The Wall Street Journal, Los Angeles Times, The Washington Post, NBC News, Time, The New Yorker, HuffPost USA Today, Business Insider, Yahoo, AOL, MarketWatch, The Atlantic, Bloomberg, New York Post, Chicago Tribune, Forbes, The Guardian and many other major publications. McIntyre has been a guest on CNBC, the BBC and television and radio stations across the country.

A magna cum laude graduate of Harvard College, McIntyre also was president of The Harvard Advocate. Founded in 1866, the Advocate is the oldest college publication in the United States.

TheStreet.com, Comps.com and Edgar Online are some of the public companies for which McIntyre served on the board of directors. He was a Vicinity Corporation board member when the company was sold to Microsoft in 2002. He served on the audit committees of some of these companies.

McIntyre has been the CEO of FutureSource, a provider of trading terminals and news to commodities and futures traders. He was president of Switchboard, the online phone directory company. He served as chairman and CEO of On2 Technologies, the video compression company that provided video compression software for Adobe’s Flash. Google bought On2 in 2009.