NEW YORK -- Chinese solar equipment manufacturers have taken a big hit in the economic downturn. But you wouldn't know it from the way their stock values have been performing lately. This month, most major Chinese suppliers of polysilicon feedstock and solar photovoltaic equipment have reported their first-quarter earnings, and all are negative. But Chinese solar companies have been among the strongest performers on the New York Stock Exchange and NASDAQ in recent weeks, outpacing their U.S., Japanese and European counterparts even before the dismal figures came in. Virtually all Chinese solar stocks spiked in trading yesterday.