Investors were encouraged by a positive projection in the company's fourth quarter.Unexpectedly optimistic guidance was the factor powering Oscar Health's (OSCR +1.42%) rise on the stock market Tuesday. The next-generation healthcare company reported its latest set of financial results, and while it missed analyst estimates on trailing results, investors liked what they saw with the crystal-ball gazing. At the end of the trading session, Oscar's stock was up by nearly 2%. Falling shortOscar's total revenue ...