The ladies love Lululemon Athletica ( LULU ), as the Canadian company's red totes are legion: festooned with quotes such as "Friends are more important than money." But tell that to shareholders, who saw LULU plunge a third between August and October. The yoga apparel maker threw the market into a downward dog despite posting stronger-than-expected second quarter revenue, up 15 percent. Yet since Dec. 2, the stock has jumped more than 20 percent and trades at around $70 per share.