Vietnamese electric vehicle manufacturer VinFast(VFSnationalcasinonodepositbonus.US) fell 15nationalcasinonodepositbonus.5%nationalcasinonodepositbonus, quoted at $5.34. on the news frontnationalcasinonodepositbonusThe U.S. National Highway Traffic Safety Administration (NHTSA) said on Monday that it has launched a formal investigation into a crash in April involving a VF8 SUV made by Vietnamese electric vehicle maker VinFast that killed a family of four.