stock in rivian automotive is dropping again perhaps because ford motor and the electrictruck startup said late friday they aren’t going to develop electric vehicles together not everyone is convinced that is the reason though even tesla and hope that it might split its stock could be a factor while the sp 500 and dow jones industrial average were both up about 07 near midday on monday rivian ticker rivn stock was down about 15 to 10850 that leaves it a bit less than 2 above the level of 10675 where