Art Cashin Video: Watch out for 'Hindenburgs'

Art Cashin continues to see "warning signals" from Wall Street.

Cashin, the UBS Director of Floor Operations at the NYSE, told CNBC's Bob Pisani traders are concerned about the appearance of multiple "Hindenburg Omens" in recent days.

Speaking at midday, Cashin said the last time there were five "Hindenburgs" in a matter of days was November, 2007 and the beginning of the year 2000, preceding tough times for stocks.