Shares of insurer Genworth Financial Inc. GNW, -1.79% soared 15.6% in premarket trade Tuesday, after the company said it has agreed to sell a majority stake in Genworth MI Canada to Brookfield Business Partners LP for about C$2.4 billion ($1.8 billion). Brookfield will pay C$48.86 per Genworth MI Canada share to acquire a 56.9% stake in the company, which is a private sector residential mortgage insurer. Genworth is making the sale to increase the chance of closing the acquisition of the company by China Oceanwide Holdings Group Co. Ltd. and its affiliates. Genworth shares have fallen 17% in 2019, while the S&P 500 SPX, -1.22% has gained 15%.