Chegg’s ($CHGG@US) shares dropped 22.7 percent in premarket trading following a first-quarter and full-year revenue guidance that falls short of analyst expectations. Baidu’s ($BIDU@China) shares rose 13 percent premarket after the Chinese-based tech company announced that it would launch its own AI chatbot called “Ernie Bot” in English. Bed Bath & Beyond ($BBBY@US) shares dropped 30 percent premarket after the home goods store raised $1 billion to avoid bankruptcy. Oak Street Health ($OSH@US) rose 36 percent after the Wall Street Journal reported that the primary care provider is close to reaching its $10.5 billion deal with CVS.