PERFORMANCE RATES
Performance Rates are an objective measurement of racetrack performance developed
by the Jockey Club Information Systems. Performance Rates assign a rate to horses
based upon beaten lengths - who beat whom and by how much - with some adjustments
made to standardize beaten distances to account for horses that are not pressed
or eased in large fields. Time is not a factor in Performance Rates, which are based
on every start by every horse in North America. Performance Rates are expressed
in lengths around a theoretical mean of zero. The average Performance Rates of the
best horses in a given year are generally about 30 lengths better than an average
performance of the average horse.
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Calculated On: 12/13/2011