HONG KONG—Shares of Evergrande on Monday plunged as much as 19 percent to their lowest in over 11 years, extending losses as investors take a dim view of its business prospects with a fast-approaching deadline for payment obligations this week. By noon, the stock had touched HK$2.06, the weakest level since May 2010. The company’s property management unit dropped over 12 percent, while its electrics car unit declined 8 percent. Movie streaming company Hengten Net, majority-owned by Evergrande, plummeted 14 percent. Evergrande has been scrambling to raise funds to pay its many lenders, suppliers, and investors, with regulators warning that its $305 billion of liabilities could spark broader risks to the country’s financial system if not stabilized. The developer said on Sunday it has begun repaying investors in its wealth management products with real estate. Policymakers are telling Evergrande’s major lenders to extend interest payments or rollover loans, and market watchers …