Stepping in between buyers and sellers is called market making. They smooth supply and demand across time. Also I don't define front running that way, FINRA do

Stepping in between buyers and sellers is called market making. They smooth supply and demand across time. Also I don't define front running that way, FINRA does. https://www.finra.org/rules-guidance/rulebooks/finra-rules/5270?element_id=10860&rbid=2403 https://www.finra.org/rules-guidance/rulebooks/finra-rules/5...