JA Solar (JASO) is up 39 cents to $6.72 and call volume is outpacing put activity by a ratio of roughly 10-to-1. 8,060 calls traded so far, with Jan, Feb, Mar and Jun 7.5 calls among the most actives. Looks like speculative call buying after Oppenheimer raised earnings estimates on JASO and a number of other Chinese solar stocks, saying fourth and first quarter guidance will prove stronger than seasonal.