Police say the victim and the suspect got into the dispute on a northbound number 4 train at the Wall Street station around 6:10 a.m. Tuesday.
The dispute escalated in the station, and the victim was stabbed in the neck with a boxcutter on the staircase.
WATCH: Raw video from the Wall Street station stabbing scene
He was taken to Bellevue Hospital, where he is expected to survive.
The suspect fled onto Broadway.
He is described as a Black male, approximately 30 years old, 6’2 to 6’4 tall.
He was wearing a blue ski mask, an orange and gray hoodie, and carrying a boxcutter.
Ex-Brit turned Manhattan resident since 2008.