Ariad Pharmaceuticals Inc. (Nasdaq: ARIA) prospered 30.5 percent in price to $6.85. Volume was 10,153,861, or six times its full-day volume average, amid generally positive news in the drug sector.

Bank of America Corp. (NYSE: BAC) was an active trader Tuesday, dealing in 126,455,431 shares Thursday, compared to a full-day average of 228,170,000. Share prices were off, though, two percent to $14.95.

Hyperdynamics Corporation (AMEX: HDY) fell 16.9 percent Tuesday to $5.95. Volume for the stock was 7,220,720 shares, nearly five times its all-day average. Even so, experts point out that the shares are up more than an astonishing 500% over the past six months