Oscar Health, Inc. (OSCR) shares soared 7.8% in the last trading session to close at $16.11. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 14.7% loss over the past four weeks.The surge was likely driven by reports that lawmakers are proposing a measure allowing individuals and employers to voluntarily enroll in a revamped version of Medicare.Oscar noted about 12% of household income is spent on employer-sponsored health plans, ...