China Sunergy Company (CSUN, news, chart) is seeing action ahead of earnings. Select solar stocks have been hot lately after Suntech Power (STP) posted strong earnings yesterday. After rallying 11.9 percent Wednesday, STP is up another 5.9 percent today. CSUN rose 3.8 percent Wednesday, but is down 13 cents to $10.29 in cautious trading ahead of its earnings report due out tomorrow before the opening bell. In the options market, sentiment is bullish, however. Volume is running three times the usual, with 2,700 CSUN calls and just 75 puts trading in the first hour. Players are actively buying September and October 10 calls ahead of the news.