Amazon could use its possible acquisition of the self-driving car startup Zoox to make discounted robotaxi rides a perk for Prime subscribers, Morgan Stanley says (AMZN)

· Amazon's reported interest in the autonomous-driving startup Zoox may signal a desire to one day launch a robotaxi service, Morgan Stanley said in a note to clients published on Wednesday.
· The retail giant could offer discounted rides to members of its Prime subscription service, Morgan Stanley said, which would help the...