Vietnamese electric vehicle manufacturer VinFast(VFSmegawayscasinocom.US) fell 15.5%megawayscasinocom, quoted at $5.34. In the news, the National Highway Traffic Safety Administration (NHTSA) said on Monday that it had launched a formal investigation into a crash in April this year involving a VF8 SUV produced by Vietnamese electric vehicle manufacturer VinFast that killed a family of four.