Bunching

Combining buy/sell orders for the same security so that they can all be processed simultaneously.

Peter, Paul, and Mary want to buy 40, 75, and 85 shares in a public marijuana dispensary company, Magic Dragons, Inc (Ticker: PUFF).

Because of legal concerns surrounding the industry and a small float of shares, PUFF shares weren’t very liquid, making the purchase of odd-lot amounts even more difficult. Luckily, their broker at Lebowski Securities was familiar with the concept of bunching, and was able to combine their orders into a single, 200-share order, and to execute all of their transactions.

The only catch was that they all had to abide by that order but, as Peter noted, the dude abides.