Oscar Health jumps on upbeat revenue forecast for 2024

** Shares of health insurer Oscar Health OSCR rise ~23.3% to $16.53 premarket

** Co forecasts annual revenue between $8.3 mln and $8.4 mln, above analysts' average estimate of $7.34 mln

** Co's Q4 medical cost ratio, the percentage of spend on claims compared with premiums collected, of 86.4% was lower than analysts' average expectation of 88.3% - LSEG data

** Up to last close, stock more than tripled in the past 12 months