By the time a stallion has established himself at stud, his fee is usually determined by performance, not the hype that surrounds new horses when they first enter stud. There are, of course, many ways to measure performance, including progeny earnings (which determines placement on the General Sires list), percent of black-type winners to named foals, quality of runners, number of Grade l winners, etc. There are seven thoroughly proven stallions that will stand for $150,000 or more in North America in 2021, and these elite horses--Into Mischief ($225,000), Tapit...