The 'Chrome' effect: Belmont prices leap overnight

California Chrome may have a modest pedigree, but the long-shot thoroughbred's attempt at a Triple Crown is causing Belmont Stakes ticket prices to skyrocket.

According to secondary ticket re-seller TiqIQ, the average price for the Belmont Stakes stands at $407.94 as of Monday, up more than 48 percent since before Chrome rode to victory at Saturday's Preakness Stakes.

California Chrome #3, ridden by Victor Espinoza, races to the finishline to win the 139th running of the Preakness Stakes at Pimlico Race Course on May 17, 2014 in Baltimore, Maryland.
Getty Images

The chestnut colt is an unlikely success story. Bred from an $8,000 mare to a $2,500 stallion, California Chrome's victory at Preakness extended his winning streak to six races and, more importantly, put him in contention for the historic Triple Crown, an accomplishment that hasn't happened since Affirmed won all three races in 1978.

"Anytime you see an occurrence in sports that hasn't happened in almost 40 years, prices go up significantly, and people are less price-sensitive," said Jesse Lawrence, founder and CEO of TiqIQ.

Read MoreWhy California Chrome fans can breathe easy after all

In 2013, when no Triple Crown was in contention (because two different horses won the Kentucky Derby and the Preakness) the average Belmont ticket price was just $87—a whooping 369 percent lower than this year's average. In 2012, when "I'll Have Another" won the first two legs of the Triple Crown, the average price for Belmont increased more than 20 percent from the year prior.

"If not for the Triple Crown, the Belmont is a regional horse race," Lawrence said.

Preakness: Victory for California Chrome
Preakness: Victory for California Chrome

Although prices may be on the rise, the Belmont is typically the third most expensive horse race behind the Kentucky Derby where this year's average price was $523, and the Preakness, where prices averaged around $246.

Read MoreWhy bet on the Derby when you can own it?

With 6,000 tickets still available, Lawrence says he expects the higher-priced tickets to fall and the lower-priced tickets to rise, given how much inventory there is.

"I think a lot of people will be happy being there not necessarily buying expensive tickets," he said.

—By CNBC's Jessica Golden.