Online betting markets cut back Hillary Clinton's prospects of winning the Nov. 8 election after a video showed the Democratic presidential candidate stumbling and having difficulty walking as she was helped into a van at a Sept. 11 memorial, raising concerns about her health.
Her probability of victory fell 7 percentage points to 64 percent on Sunday, the biggest one-day drop since she accepted her party's nomination in late July, according to online predictions market PredictIt. Sunday's trading volume on PredictIt was also the largest in at least three months.
The sharpest plunge occurred immediately after the video, taken by a bystander, showed up on social media.