JA Solar (JASO, news, chart, volatility) call options are active, as the stock continues its recent run higher. JASO is up 63 cents to $5.00 and up 53.8 percent on the week amid renewed interest in solar energy stocks. February 5 calls are the most actives, with almost 2,000 traded and 100 percent trading at the offer. Jan 5 calls are also active.