The punishment stems from a confrontation between the two former series champions, who wrecked in practice last week and then carried it into the NASCAR officials' trailer.
NASCAR spokesman Ramsey Poston said the drivers were disciplined solely for the on-track portion of their clash, when the drivers deliberately used their cars as battering rams.
"We will continue to keep a check on this sport and won't let it get out of hand," Poston said. "If there is a repeat between these two, then we will take it much more seriously."
Although Busch and Stewart confronted each other during a closed-door meeting with NASCAR officials after the incident -- and ESPN.com's David Newton reported that Stewart punched Busch, according to sources close to the situation -- Poston stressed that nothing that happened off the track factored into their discipline.
And while it was Busch who slammed his car into Stewart's as they exited the track, Poston said both drivers were punished because they were involved.
I personally like it. This is what NASCAR needs....more edgier drivers to make the action more exciting than simply driving around the same pattern 400 times.