$Rivian Automotive (RIVN.US)$ options volume jumped as the stock climbed about 18% after $VOLKSWAGEN A G (VWAGY.US)$ increased its investment plans in the electric vehicle maker.
More than 466,000 options tied to the EV maker changed hands as of 12:11 p.m. in New York, more than triple the 20-day average, according to data compiled by Bloomberg. That landed Rivian in the fifth spot for the most active stock options, behin...