skid

That has been tested anew lately, with a skid in tech stocks pushing indexes down earlier this month and making some investors nervous.

McLaren team chief Andrea Stella explained that the disqualification of both cars, for excessive wear of the skid blocks, was a result of an unexpected level of "porpoising... exacerbated by the conditions" in Nevada.

Both McLaren drivers suffered a blow when they were disqualified from the Las Vegas Grand Prix last weekend after the skid blocks on their cars were found to have worn too much.

Team principal Andrea Stella said McLaren did "not believe we took excessive risk with the ride-height" and that the team had "added a safety margin" intended to limit skid wear in qualifying and race.

The skid blocks inserted into the underbody 'plank' are there to ensure the team cannot run the car lower than the regulations intend.