$GSK Glaxo has only 10% in margin of safety. Sell. $GSK, GSK plc / H1 But $REGN Regeneron is worth $535.88.HOLD. $REGN, Regeneron Pharmaceuticals, Inc. / H1 $CIEN and optical networking stocks are in big trouble. Deals are delayed with market fears up: $CIEN, Ciena Corporation / H1 $ANET Arista posted poor ER. Another bad quarter awaits: $ANET, Arista Networks, Inc. / H1