So have shares of ethanol producer Pacific Ethanol (nasdaq: PEIX - news - people ).

FORBES: High Energy Stocks

Flannery widened his year-end loss expectations for Pacific Ethanol to 41 cents a share from a loss of 29 cents a share.

FORBES: Magazine Article

Flannery cut price targets and estimates for Aventine Renewable Energy Holdings, Pacific Ethanol and VeraSun Energy, which sent shares down across the sector.

FORBES: Magazine Article

Shares of companies like VeraSun Energy, Pacific Ethanol and ADM, which had been beaten down by as much as 60%, quickly began recovering when news of the higher mandates broke.

FORBES: Magazine Article

High-profile companies failed, including Bill Gates-backed Pacific Ethanol.

FORBES: Clean Tech's Repeat Lesson: Venture Capital Isn't For Factories

So have shares of ethanol producer Pacific Ethanol.

FORBES: Magazine Article

Shares of companies like VeraSun Energy (nyse: VSE - news - people ), Pacific Ethanol and ADM, which had been beaten down by as much as 60%, quickly began recovering when news of the higher mandates broke.

FORBES: Whoops