When a Popular Tax Shelter Springs a Leak (at The Wall Street Journal)

NYSE stocks posting largest volume decreases (AP)
A look at the 10 biggest volume decliners on New York Stock Exchange at the close of trading: : Arena Pharmaceuticals Inc. rose 34.5 percent to $5.91 with 96,904,200 shares traded.

Most active Nasdaq-traded stocks this week (AP)
Shares of some top utilities companies were down at the close of trading: : Arena Pharmaceuticals Inc. rose 34.5 percent to $5.91 with 96,904,200 shares traded.

Apple Should Buy Infineon to Own Mobile And Screw Intel (at Seeking Alpha)

Most active Nasdaq-traded stocks (AP)
A look at Nasdaq 10 most-active stocks at 1 p.m.: Arena Pharmaceuticals Inc. rose 11.9 percent to $7.81 with 20,627,400 shares traded.

Thursday Options Recap (at Seeking Alpha)