According to the ETF Finder at ETF Channel, AMRS makes up 1.05% of the WilderHill Clean Energy Portfolio ETF ( AMEX: PBW) which is trading higher by about 0.8% on the day Tuesday.
According to the ETF Finder at ETF Channel, AMRS makes up 1.90% of the WilderHill Clean Energy Portfolio ETF ( AMEX: PBW) which is trading higher by about 1.2% on the day Friday.