The Los Angeles Business Journal’s index of largest local public companies closed down for the week.

The weighted LABJ Stock Index dropped 0.5 percent to 176.38 for the trading week ended Nov. 22. Gainers outpaced decliners 80 to 74, with nine companies unchanged.

Los Angeles online matchmaking company Spark Networks Inc. dropped 18 percent to $5.39. Great Hill Partners, which is Spark’s largest shareholder, gave notice that it intended to sell its shares.

Wilshire Bancorp Inc. rose 12 percent to $9.89. The Koreatown bank holding company completed its acquisition of Saehan Bancorp.

Ceres Inc. fell 11 percent to $1.67. The Thousand Oaks energy crop company reported a sharp decline in revenue for its fiscal fourth quarter.

Simulations Plus Inc. fell 8 percent to $4.97. The Lancaster company, which develops software for pharmaceutical industry, said that its chief financial officer was retiring in January.

Prepaid debit card company Green Dot Corp. fell 5 percent to $23.34. The Federal Reserve announced that it had approved the acquisition of GE Capital’s Wal-Mart-branded card business by the Pasadena company.