In a graphic example of how ripples from the stone that was the Volkswagen emissions cheating scandal are spreading across the rest of the automotive pond, Johnson Matthey 's share price dropped further during September when the scandal first brook, but has since recovered as it dawned on investors that the result of VW's emissions scandal is likely to be tougher controls... even if there is a marked swing to gasoline engines. Johnson Matthey was already in trouble due to a combination of falling platinum group metals prices and slowing demand, notably in key automotive markets such as China, for jewelry and in the oil industry as investment has been cut back.