The Yankees parade is considered a "ticker tape" parade. The only problem with this description is that there is no such thing as ticker tape anymore; stock market information is delivered in electronic format.
Basically, office workers dump shredded paper and the contents of their wastebaskets on to the streets below. Therefore, you are more likely to be hit on the head with a grease-stained Egg McMuffin wrapper than you are to see a shred of ticker tape.
This photo shows office workers throwing their trash to the streets below.