Some people consider ownership of a race horse a hedge against inflation, somewhat like owning land, gold or oil stocks. On occasion, such an investment proves to be a windfall.

That appears to be the case for Dominic Tesauro, who purchased Dottie B. for $6,700 at last season's Timonium Fall Yearling Sales. Dottie B. will attempt to add to her $25,490 earnings in Saturday's $27,500-added Cameo Stakes at Laurel Race Course.

Although she was sired by Nodouble, a multiple stakes winner who earned $846,749 and is nearly 16 hands, Dottie B., was overlooked by the diamond-in-the-rough seekers at Timonium.

"The lack of interest may have been attributable to the imprssion that the dam of Dottie B. (Mad Cutie, by Rash Prince) had a disappointed producing record," said trainer Ralph J. Delaney Jr.

Dottie B., who has had seven starts this year, was a clear winner in each of her three triumphs, one being Bowie's Kindergarten Stakes.

King Leatherbury, racing on four fronts and faring best at Laurel, is hopeful he won't run out of time in his pursuit of Everett W. Hammond, the nation's leading trainer in terms of victors. Going into yesterday's action, Leatherbury trailed by three winners.

Evacuees from the Chicago fire that gutted the stands at Hawthorne Park a month ago are adjusting to Maryland racing. Trainers Nello Panico, Bob Treadway, Walter (Monk) Hall, Paul Mitchell and Manuel Perez collectively have started 11 horses since their arrival less than two weeks ago and have had one winner. Mr. Boomerang led throughout in an allowance race Tuesday and returned $11.40.

Saturday's Sun Bowl football game, pitting the University of Maryland against Texas, will be shown on selected monitors over Laurel's closedcircuit TV system. Post time for the first race Saturday is 12:30 p.m., an hour before kickoff.

Apprentice Greg Longa makes his riding debut in today's seventh race astride Yard Marker. The 18-year-old lightweight is under contract to trainer Sonny Hine and will be handled by agent Chick Lang Jr.

Jockey Bill Passmore dominated the action yesterday, winning aboard four of six mounts, including Best Man, a two-length winner of the feature race over Advan.

Passmore, father of seven children and a veteran of 30 years in the saddle, survived a claim of foul in the second race when his winning mount, Wake Up Lisa, brushed with Dreaming Deanie in the stretch, prompting an objection by Tom Kupfer astride the second-place finisher.

Passmore's other winners were Marwan in the fifth and Fortis in the seventh.