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Performance Rates
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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.
Type of race:
Racing year:
Calculated On: 7/15/2008
2008 Overall
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electronic or mechanical, without written permission of the copyright owner, Thoroughbred Times Company, Inc.