Lululemon ($LULU@Canada) shares dropped 10 percent in premarket trading after the athletic apparel company lowered its gross margin guidance for the first quarter. Duck Creek ($DCT@US) shares rose 39 percent premarket. The provider of intelligence solutions for the insurance company will be taken private by Vista for $19 a share in cash. Zillow ($ZG@US) rose 4 percent premarket after Bank of America ($BAC@US) double-upgraded the stock to buy. Hologic ($HOLX@US) shares rose 2.8 percent premarket after the women’s diagnostics provider reported better-than-expected fiscal first-quarter revenue.