scalping

1. Attempt to take maximum financial benefit of the scarcity of an item (such as tickets to a sellout show) by hoarding it.

2. Trading strategies in which goods or securities are bought and sold for small, short-term, profit during a trading session, rarely carrying a trading position to the next day.

3. Spreading favorable but false information about a good or security to boost its demand and then unloading it. Also called pumping and dumping.