Week in review: Twitter co-stars with Katy Perry; Robot Hall of Fame returns

The following is a roundup of my stories from Investor’s Business Daily at Investors.com.

Twitter co-stars in Katy Perry movie, but followers didn’t follow through. (July 13, 2012)

Intuitive Surgical, iRobot and Terminator to be inducted into Robot Hall of Fame two years late. (July 13, 2012)

Coinstar shares fall on analyst report raising questions about Redbox-Verizon joint venture. (July 13, 2012)

Video game sales at U.S. retail are down nearly 28% year to date; Batman games stand out in June. (July 12, 2012)

Dell, Hewlett-Packard, Intel and Microsoft shares down on lackluster Q2 PC shipment data. (July 12, 2012)

LinkedIn shares down for second straight day on concerns about Facebook competition. New survey shows Facebook gaining in online job recruiting. (July 10, 2012)

Apple to start selling new iPad in China after settling tablet trademark dispute. (July 10, 2012)

Applied Materials lowers its full-year outlook on weak demand. (July 10, 2012)

LinkedIn stock falls on Facebook plans to launch a job posting board. (July 9, 2012)

Photo: Pop singer Katy Perry in “Katy Perry: Part of Me.”