Oct. 19 (Bloomberg) -- Shares of the following companies had unusual moves in Thailand trading. Stock symbols are in parentheses and prices are as of the close in Bangkok.

The SET Index fell for a second day, declining 1.5 percent to 938.19.

Auto-parts makers: Somboon Advance Technology Pcl (SAT TB) paced declines in shares of auto-parts producers on expectation plant closures will affect orders for their products. Somboon (SAT TB) slid 5.8 percent to 16.4 baht, the lowest close since April 19, 2010. Thai Stanley Electric Pcl (STANLY TB) lost 1.8 percent to 136.5 baht. Aapico Hitech Pcl (AH TB) fell 3 percent to 8 baht. Thai Rung Union Car Pcl (TRU TB) declined 6.8 percent to 4.80 baht.

Nissan Motor Co. will extend the closure of its plant in Thailand until Oct. 28 because flooding in the country has led to delays delivering parts, Chris Keeffe, spokesman for the Yokohama-based automaker, said today by phone. Mazda Motor Corp. will halt production of passenger cars in Thailand until Oct. 22 because of a shortage of parts.

Siam Commercial Bank Pcl (SCB TB), Thailand’s third-biggest lender by assets, dropped 5 percent to 108 baht, the most since Oct. 4. Net income in the third quarter rose 29 percent from a year earlier to 8.35 billion baht ($273 million), compared with an analyst estimate of 8.4 billion baht.

--Editor: Matthew Oakley

To contact the reporter on this story: Anuchit Nguyen in Bangkok at anguyen@bloomberg.net.

To contact the editor responsible for this story: Darren Boey at dboey@bloomberg.net