Below is a chart showing the trailing twelve month trading history for MEMC Electronic Materials, Inc.

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Shares of silicon wafer producer MEMC Electronic Materials slumped in late trading Wednesday, after the company reduced its profit outlook for the full year.

FORBES: MEMC Shares Slide On Reduced 2011 EPS Guidance

Companies such as MEMC Electronic materials, which gained 8.4% in the aforementioned rally, benefit from the diversification and safety they can derive from exposure to these two industries.

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Solar power chip maker MEMC Electronic Materials (WFR) announced a series of restructuring steps today to better align the business to current and expected market conditions in the semiconductor and solar markets.

FORBES: MEMC Electronic Materials Announces Restructuring Efforts

The reduction reflects the suspension of operations at two plants: Shin-Etsu Chemnical has stopped manufacturing operations at its facility in Shirakawa, while MEMC Electronic Materials (WFR) has shut its Utsunomiya facility.

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Goldman also reduced its price targets for a wide range of alternative energy stocks, including not just First Solar but also MEMC Electronic Materials, SunPower, STR, EnerSys, Itron, Amyris, KiOr and Solazyme.

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Among the largest underlying components of TYH, in trading today Tellabs, Inc. ( NASD: TLAB) is down about 0.5%, MEMC Electronic Materials, Inc. ( NYSE: WFR) is down about 4%, and Brocade Communications Systems, Inc. ( NASD: BRCD) is lower by about 0.8%.

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This gain was on normal trading volume and completely consistent with the bullish move in other solar-related stocks today such as such as GT Advanced Technologies (GTAT), First Solar (FSLR), MEMC Electronic Materials (WFR), SunPower Corp. (SPWR) and Veeco Instruments (VECO).

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