Biodel Inc. (Nasdaq; BIOD) shares gained 29.6 percent to $2.51 Thursday. Volume was 5,866,108, nearly six times its full-day volume average. The company is expected to issue a corporate update today, to include detailed information about the development of follow-on formulations of its lead product Linjeta.

Micron Technology Inc. (Nasdaq: MU) traded in 44,726,493 shares Thursday, better by half its daily average. Prices for MU were up by 4.34 percent to $9.74, after a Baird analyst upgraded the memory chip maker citing stabilizing prices and a strong outlook for NAND flash memory chips.

YMI BioSciences Inc. (AMEX: YMI) fell 16.3 percent Thursday to $2.21 Volume for the stock was 836,963 shares, better than twice its full-day average. The Canadian-based YMI is a drug development company advancing three clinical-stage products.