BRIEF-RESEARCH ALERT-Barclays ups JA Solar, SunPower, Suntech Power to overweight

Dec 7 (Reuters) -

* Barclays raises JA Solar Holdings Co Ltd to overweight from

equal-weight

* Barclays raises SunPower Corp to overweight from equal-weight

* Barclays raises Suntech Power Holdings Co Ltd to overweight from

equal-weight

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