added money
Money added to the purse of a race by the racing association or a breeding or other fund to the amount paid by owners in nomination, eligibility, entry and starting fees: for example, “the $1 million-added Kentucky Derby.”
Average-Earnings Index (AEI)
A breeding statistic that compares racing earnings of a stallion or mare’s foals to those of all other foals racing at that time. An AEI of 1.00 is considered average, 2.00 is twice the average, 0.50 half the average, etc.