With little chance that the government will pass a spending bill before tonight's midnight deadline, the markets tumbled during the midday with the Dow plummeting 100 points to 15,158. Nasdaq slipped 6 points to 3775.

On the upside

Shares of LDK Solar (NYSE: LDK) and Suntech Power Holdings (NYSE: STP) climbed after China announced tax breaks for solar power products companies.

China Ming Yang Wind Power (NYSE: MY) won a bid to build 29 units of 3MW super compact drive wind turbine generators off shore Zhuhai Guishan Island in China.

A Seeking Alpha contributor expects Rockwell Medical's (Nasdaq: RMTI) stock price to soar over $19.

On the downside

ArQule (Nasdaq: ARQL) presented mixed results to the European Cancer Congress for its tivantinib in treating lung cancer patients.

A Seeking Alpha contributor locked in profits on Geron (Nasdaq: GERN).

The market share of Apple's (Nasdaq: AAPL) iPhone fell before the recent launch of the iPhone 5s and 5c.

In the broad market, declining issues outpaced advancers by a margin of nearly 7 to 3 on the NYSE and by more than 7 to 5 on Nasdaq. The broader S&P 500 lost 8 points to 1683.