Sometimes happens with fights when people get caught up in the hype and anticipation on fight night. Don't read too much into it.
Probably because of the odds. If it is 5-1 then it is worth the risk. 20 dollars for JMM will net you 100 dollars. A 100 dollars will get you 500. WQorth the risk for small bets. Try betting 50 dollars for a JMM win and it would get you 250 dollars if you win. If you lose, that is just 50 dollars. When Mayweather pulled the weight fiasco, the odds tileted even farther in his favor. That is just too enticing for some gamblers.
Also, it always always happens on a long odds fight (not Tyson-Douglas OR Tyson-Holyfield I). People flood the area around the fight, the actual fight, with small bills. It's like "look at the ****ing odds, anything could happen tonight". It's a fair shout, actually. The biggest shortening off odds up until that time, allegedly due to small bills, was Liston-Ali I. Previously it had been Sullivan-Corbett. Also, by round seven, it was hard to find someone at ringside who would take money on Corbett. One of Sullivan's own seconds described his man's chances as "100-1" during round 8. Yes, I have a girlfriend.
Can't figure where you are getting you information. Bodog is up to -400 for Floyd I got it at -325. and oddschecker shows a lot of -450, -500 and higher.
That's interesting, actually. I've always wondered about the dynamics behind which way the line changes right before the fight. If the late money tends to come in on the favorite, or the underdog. And the reasoning behind it.
Simple. It's all about the odds. A lot of the bettors always wait till the last minute to make a bet.
this isnt late money yet, late money comes minutes before the bout and will be on flod. against hatton he went from -180 to -270 in about 10 min before the fight