According to Bill Finley:
The pool for the Dwyer closed at 4:38:38. At 4:38.02, an $8,500 win bet was made on the eventual winner. A series of bets between $2,083 and $4,355 followed. At 4:38.16, 12 bets in increments of $5,000 were bet at the same time. It’s apparent that one player made a $60,000 win bet at that time, but his or her tote company was only able to record the bets at a maximum of $5,000 each.
A bet of $2,012 followed at 4:38.18. At the exact same time, a win bet of $24,055 came in and then at 4:38.21another $11,596 was bet to win on Firenze Fire.
Odds are updated in cycles and the cycles are more frequent as the race draws closer. Within the last minute before the race goes off, the odds are updated every 10 seconds.
At Cycle 2, approximately 20 seconds before the race began, Firenze Fire was 6.3-1. He went down to 5-1 with the next flash and then closed at 5-2.
http://www.thoroughbreddailynews.com...wyer-wagering/