Dosage Analysis: Emerging Market Stands Out in Derby

Dosage is a classification system for Thoroughbred pedigrees that evaluates aptitudinal type; i.e., those inherited traits that shape a horse's competitive profile. It is based on identifying sires within the first four generations that prepotently transmit varying degrees of speed or stamina. These influential stallions, relatively few in number compared to all those standing at stud in any era, are known as chefs-de-race. Aptitudinal type spans the full spectrum of performance, from early-developing dirt sprinters to late-maturing turf routers. It is quantified through three primary metrics: the Dosage Profile (DP), the Dosage Index (DI), and the Center of Distribution (CD). The DP consists of five numbers—Brilliant, Intermediate, Classic, Solid, and Professional—representing the elements of speed and stamina within a pedigree, from pure speed (Brilliant) to extreme stamina (Professional). From the DP, the DI is calculated as a ratio of prepotent speed to stamina, while the CD places the pedigree on a linear scale along the speed-stamina continuum. Of the two, the CD is generally regarded as the more precise indicator of overall aptitudinal balance. As a broad guideline, sprint-oriented pedigrees tend to produce higher Dosage figures, while stamina-oriented pedigrees produce lower ones. The following article by Kenneth Kush applies Dosage analysis to the 2026 Kentucky Derby (G1), identifying the contenders best equipped to handle a mile and a quarter on dirt early in their 3-year-old season.—Steve Roman Top Kentucky Derby Contenders by Dosage The Kentucky Derby is a distinctive race—3-year-olds in early spring running a fast-paced 1 1/4 miles on dirt—and so demanding that it is almost always won by a horse that truly "gets the distance." Giacomo and Mine That Bird do happen, but that's when a Derby falls apart in the racing and carnage has likely befallen far superior runners. So, let's focus on the subset of runners in this year's Derby who, according to their Dosage metrics and pedigrees, are best suited to "stay out" the 1 1/4-mile trip, assuming the race is run at its usual strong pace. The American breeding program focuses on producing 7- to 9-furlong dirt horses, with 1 1/4 miles being a luxury rather than a necessity. From 1985 to 2015 the number of 1 1/4-mile stakes races run annually in America declined from 5.5% (of all stakes races) to just 2.6%, according to Equibase. Meanwhile, the percentage of 1 1/8-mile stakes races dropped from 17.9% to 12.1% and the percentage of 1-mile stakes races rose from 12.4% to 17.1%. Regarding the field for this year's Kentucky Derby, a majority fall into the category (Dosage/pedigree-wise) of an 1- to 1 1/8-mile horse trying to stretch out to 1 1/4. A few might do it, but most won't. We do see runners who are much more likely to do so, based on their Dosage metrics and pedigrees. They are: Emerging Market, Danon Bourbon, Renegade, Wonder Dean (JPN), Chief Wallabee, Commandment, Further Ado, Golden Tempo, and The Puma. This following analysis of this subset of runners is meant to be a component of one's overall assessment of each horse's winning potential. Dosage metrics are a tool just as speed figures are. The race replays must be watched. The body types and projections on maturity/development must be considered. Trainer profiles, of course, matter. Dosage/pedigree should be one criterion of many when assessing which horses have the best chances of winning or at least running well. A note on Dosage metrics. They are produced using large sample sizes of the stakes winners each stallion has produced, so this is a robust behavioral database that is purely objective and statistically has a very high degree of accuracy. As these are population studies, however, there will be a "bell curve" within each subpopulation. Remember, Nijinsky II sired 1989 Breeders' Cup Sprint (G1) winner Dancing Spree, and Dixieland Band sired the 1993 2 1/2-mile Ascot Gold Cup (G1) winner Drum Taps. They were both outliers and far from the norm for their respective subpopulations. Following each contender's name is his DP, DI, and CD. For the Kentucky Derby, a Dosage Profile with a higher Classic category (middle) is better, with any points in the stamina wing (Solid, Professional) being a bonus. For the Center of Distribution, lower is better with.50 more ideal than 1.00. Emerging Market [DP: 12-4-17-5-0 DI: 1.81 CD:.61] From a pure Dosage perspective, the best pedigree of the American group. By Brilliant/Classic chef-de-race Candy Ride (ARG), out of a mare by Classic/Solid chef-de-race Empire Maker, he has a beautifully balanced Dosage Profile with the highest concentration in the Classic category, and importantly, he has a stamina wing. His 5 Solid points make him an exception to the rule in modern American dirt pedigrees. The fact that he won the 1 3/16-mile Louisiana Derby (G2) in only his second lifetime start solidifies his status as a true 1 1/4-mile horse. Experience is a totally different matter—and it's clearly his "X factor"—heading into a race that sternly tests a horse's mental constitution. But on Dosage alone, he is the "gold standard" of the American contingent. Dosage/pedigree grade: A+ Danon Bourbon [DP: 1-7-16-0-0 DI: 2.00 CD:.38] The influence of epic "Classic" chef-de-race Tapit is seen here as the broodmare sire of Danon Bourbon. Tapit both raises the classic component of the Dosage profile and lowers the Center of Distribution, giving this pedigree distinct 1 1/4-mile potential. Like Emerging Market, Danan Bourbon has already won going 1 3/16 miles, so it's hardly a stretch to think the Derby distance is within his scope—empty stamina wing notwithstanding. The X factor here, of course, is his ability to transfer his outstanding Japanese form to America—and in the Kentucky Derby, of all races. If you are willing to take that leap of faith, his Dosage/pedigree are clearly on your side. Dosage/pedigree grade: A Renegade [DP: 9-3-20-0-0 DI: 2.20 CD:.66] If there is a "bullseye" for a 1 1/8- to 1 1/4-mile American dirt pedigree, he has hit it. By outstanding "Brilliant/Classic" chef-de-race Into Mischief, out of a graded-stakes winning daughter of Classic chef-de-race Curlin, a racehorse gets almost no better pedigree to succeed in the top American dirt races. Throw in that his second dam is a graded-stakes winning daughter of Bernardini, and you have a total green light here, from a pedigree perspective, for the Derby. If you liked Renegade based on your other criteria, you should love him after factoring in his Dosage metrics/pedigree. While he has no stamina wing in his Profile he has a significant Classic concentration—one that should enhance his ability to stay 1 1/4 miles. Dosage/pedigree grade: A Wonder Dean [DP: 1-0-4-1-0 DI: 1.00 CD:.17] A Japanese-bred with no American or European chefs-de-race in his first three generations. Thus, his Dosage metrics, per se, have low meaning. However, and significantly, his grandsire is the legendary Deep Impact, who was the leading sire in Japan for an amazing 11 consecutive years. The list of his best runners, as well as those of his daughters, reads like an international "who's who" at classic distances. With a high degree of confidence, we can predict that if the (primarily Japanese) data on Deep Impact were analyzed, he would be designated as either a Classic/Solid or a Classic/Professional chef-de-race. Using a hypothetical Classic/Solid designation, Wonder Dean's Dosage metrics would be: [DP: 1-0-8-5-0 DI: 0.56 CD: -.21]. This would represent the stoutest pedigree of this group and leave little doubt that 1 1/4 miles is well within his grasp. Wonder Dean could well be considered the Japanese counterpart to our American, Emerging Market, in the 1 1/4-mile potential category. But, as with Danon Bourbon, the mystery with him is his ability to replicate his solid foreign form in America. Dosage/pedigree: A+ Chief Wallabee [DP: 3-10-24-1-0 DI: 1.92 CD:.39] This runner has only upside potential with his Dosage profile and Center of Distribution. He gets a major Classic infusion from the two very potent chefs-de-race up close in his pedigree (Tapit and Medaglia D'Oro). His stamina wing is light with just 1 Solid point, but that should be no deterrent. If you like Chief Wallabee based on your other criteria, his Dosage metrics should give you added confidence. He is highly likely to stay the 1 1/4-mile trip. Dosage/pedigree grade: A Commandment [DP: 9-2-9-0-0 DI: 3.44 CD: 1.00] Another son of Brilliant/Classic chef-de-race Into Mischief, but with a less-robust female family Dosage contribution than Renegade. His Dosage Profile and high Center of Distribution make him much less of a sure thing to stay 1 1/4 miles than others in this subset. But given that he is by Into Mischief, out of a graded stakes-winning mare, and has Malibu Moon and Deputy Minister close up in his female family, he certainly cannot be excluded from consideration based on his pedigree. His Dosage Profile lacks any stamina contribution, but that has increasingly become the norm with the breed these days. If your other criteria score him highly, the fact he's a son of Into Mischief should encourage you—but his high Center of Distribution is concerning. Dosage pedigree grade: B- Further Ado [DP: 4-3-13-0-0 DI: 2.08 CD:.55] By superior American dirt sire Gun Runner, Further Ado has a Dosage profile with its highest concentration in the Classic category, and with his Center of Distribution being.55, the pedigree door is open for him to stay 1 1/4 miles. Like most of the other contenders, he lacks a stamina wing, which in decades past would've been a concern, but in 2026, it's the rule, not the exception. If you like him based on your other key criteria—and, by the numbers, he has run the single-fastest race to date of the Americans—his Dosage/pedigree should not dissuade you. Dosage/pedigree grade: B+ Golden Tempo [DP: 7-8-28-1-0 DI: 1.93 CD:.48] A son of the mighty Classic chef-de-race Curlin, he's out of a graded-stakes winning daughter of Bernardini, from a Phipps family. Enough said? His Dosage metrics are a complete "go" with his high classic contribution and low CD. His stamina wing is meager, but who's counting here in 2026? If this Derby has a blistering pace, he's a deep closer I'd want on my team. His inherent talent/speed should be determined by other criteria, but on Dosage/pedigree alone he is an elite category. Dosage/pedigree grade: A The Puma [DP: 4-7-15-0-0 DI: 2.47 CD:.58] His Dosage Profile, which has its highest concentration in the Classic category, and his Center of Distribution would both suggest that 1 1/4 miles could be within his reach. His sire, Essential Quality, is a champion son of Classic chef-de-race Tapit, and his female family influences are solid if unspectacular. And, once again, we see no stamina wing here, much like many of the others, and his Dosage Profile projects a 1- to 1 1/8-mile animal who may stay 1 1/4 miles. Your other criteria should determine how strongly you feel about his chances of winning the Derby. Dosage/pedigree grade: B