The Market Vectors Solar Energy ( KWT) had been down 36.5% year-to-date.

FORBES: Solar ETFs Rebound

Solar investors will want to keep an eye on the Solar Energy ETF (KWT), which is comprised of 28% MEMC stock.

FORBES: MEMC Electronic Materials Announces Restructuring Efforts

Another ETF with exposure to solar is the Market Vectors Solar Energy ETF ( KWT) which counts GT Solar ( SOLR) as its largest holding at a 10.46% weighting, followed closely by First Solar at 10.09%.

FORBES: Solar Stocks: A Value Investor's Best Friend?