    The sweeping rules have hit chip stocks, with the Philadelphia Semiconductor Index (.SOX) falling nearly 6% by the end of the day. American semiconductor equipment makers Lam Research Corp <LRCX.O>, Applied Materials Inc <AMAT.O> and KLA Corp <KLAC.O> were all down more than 4%.   
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Lam Research Corp
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KLA Corp
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Philadelphia Semiconductor Index
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Applied Materials Inc