Competitive bidding continued throughout the day Sunday as the Book 4 section of the Keeneland November Breeding Stock Sale opened Sunday with a pair of weanlings by Yaupon leading the way. For the session, 267 horses grossed $10,837,500 for an average of $40,964 and a median of $30,000. The average was up 14.70% and the median was up 20.00% from last year's corresponding session when 270 horses sold for $9,642,400 and the average was $35,713 and the median was $25,000. With 58 horses reported not sold, the buy-back rate for...