Asian shares were mixed Thursday in thin holiday trading, with most markets in the region and elsewhere closed for Christmas. In Tokyo, the Nikkei 225 lost less than 0.1% to 50,317.43. It has gained nearly 30% this year. The dollar slipped to 155.70 Japanese yen from 155.94 yen. The euro was unchanged at $1.1780. Markets in mainland China advanced, with the Shanghai Composite index up 0.3%. Hong Kong's exchange was closed. Investors were encouraged by a statement by the People's Bank of China, China's central bank, promising to ensure adequate money supply to support financing, economic growth and inflation targets. Earlier in the week, the PBOC had opted to keep its key short-term lending rates unchanged. Shares fell in Thailand and Indonesia. On Wednesday, the S&P 500 index rose 0.3% to 6,932.05 and the Dow Jones Industrial Average added 0.6% to close at 48,731.16. The Nasdaq composite added 0.2% to 23,613.31 Trading was extremely light as markets closed early for Christmas Ev