Voya Financial (VOYA) shares soared 5.9% in the last trading session to close at $74.94. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 7.6% gain over the past four weeks. Voya will buy OneAmerica Financial's full-service retirement plan business. The acquisition adds strategically attractive scale to Voya's full-service retirement business within Wealth Solutions. Once acquired, the acquisition will broaden Voya's set of capabi ...