After a noticeable cooling off period during days two and three of the Keeneland November breeding stock sale, Friday’s fourth session rebounded with gains on a steady day of selling.

Juddmonte Farms stallion Mizzen Mast, sire of two Grade 1 winners at the Breeders’ Cup, will have his stud fee raised to $15,000 for the 2013 breeding season.

The 14-year-old by Cozzene was the only sire with two Grade 1 winners at this year’s Breeders’ Cup, represented by Juvenile Fillies Turf winner Flotilla and Turf Sprint winner Mizdirection. Mizzen Mast ranks 12th on the North American turf sire list. Mizzen Mast was bred and raced by Juddmonte Farm, winning the Grade 1 Malibu while trained by Bobby Frankel, and began his stud career at Juddmonte in 2003.

Multiple Grade 2 winner Mission Impazible will be retired by Twin Creeks Racing Stable after his planned start in the Clark Handicap on November 23 at Churchill Downs and will begin his stallion career in 2013 at Becky Thomas’ and Dennis Narlinger’s Sequel Stallions in Hudson, N.Y. A stud fee will be announced at a later date.

Grade 1 winner Bob and John will stand at Highcliff Stallions at Mill Creek in Stillwater, N.Y., for the 2013 breeding season, with a fee to be announced. The 2006 Wood Memorial Stakes winner will continue to stand as a partnership between Magnolia Racing and Pin Oak Stud and will join fellow Magnolia Stable stallion Congaree at the New York farm located near Saratoga Springs.

Classic winner Shackleford will stand his first season at Darby Dan Farm for a fee of $20,000, headlining a seven-horse roster for the Lexington, Ky., farm that includes Grade 1 winner and first-year stallion Dialed In.

The stakes-winning filly American Lady raised the bar during the fourth session of the Keeneland November breeding stock sale on Friday, selling for $350,000 to Castleton Lyons to establish a new high price at the session.

A 4-year-old Stormy Atlantic filly, American Lady was offered as a racing or broodmare prospect by Hill 'n' Dale Sales Agency. Gabriel Duignan, who signed the ticket on behalf of Castleton Lyons, said the filly is likely to be retired and bred in 2013.

Young stallions Desert Party and Girolamo will be available for viewing at Darley's Jonabell location in Lexington, Ky., through Jan. 11 before shipping to stand the 2013 breeding season at Becky Thomas' Sequel Stallions in Hudson, N.Y.

Desert Party, who began his stud career in 2011, stood at Jonabell in 2012 for a fee of $10,000. A 6-year-old Street Cry stallion and Grade 2 winner, Desert Party has 15 weanlings offered at the Keeneland November breeding stock sale, including an $85,000 purchase out of the Kris S mare Lil Cozette on Wednesday.

Grade 1 winner Boys At Tosconova will begin his stud career in 2013 at Questroyal North in Stillwater, N.Y., for a fee of $5,000 live foal. The 4-year-old son of Officer is owned by a partnership of Questroyal Stud, Gus Schoenborn, and Taylor Made Stallions and will be syndicated.

Gainesway in Lexington, Ky.,  released 2013 stud fees for its 10-stallion roster on Friday, and kept Tapit’s fee at $125,000, the same as 2012, while it adds two new stallions, recent Breeders’ Cup Dirt Mile winner Tapizar and multiple Grade 1 winner To Honor and Serve.

Session four of the Keeneland November breeding stock sale continued the pattern set by Day 3 of consistent prices with few outliers.

As of mid-session, Friday’s session-topper was Four Gifts, a 6-year-old Even the Score mare who sold to Barry and Judith Becker for $340,000. Indian Creek, agent, consigned the mare, who sold in foal to Hard Spun.