Ciena (CIEN) has tumbled 7.8% to $22.37 after beating third-quarter earnings and sales forecasts but offering below-consensus fourth-quarter revenue guidance. Stocks look set for a higher open this morning after gauge of manufacturing strength in China rose unexpectedly and euro-zone inflation increased more than expected. Shoe Carnival (SCVL) has soared 17% to $19.25 after beating earnings forecasts and raising the low end of its full-year guidance.