Best opening price: Real Sociedad paid $1.85, Rayo Vallecano paid $4.42, a draw paid $4.03 (the best of 20 bookies). Prices change before kickoff.
Fair chance at the open (our read of the prices, with the bookies' cut taken out): Real Sociedad about 5 in 10, a draw about 2 in 10, Rayo Vallecano about 2 in 10.
How much the bookies keep: about $6.87 of every $100 bet on this game.
Since betting opened: the price has barely moved.
Prices from when betting opened on Sun 25 Oct