One of the original Market Wizards, he was a fearsome option market maker on the floor of the CBOE going all the way back to... the seventies. (mauldineconomics.com)
How do option market makers actually hedge their positions so that they do not have a price risk? (money.stackexchange.com)
The SpotOption Exchange binary options market maker was fined by the CySEC $ 10 000 for non-compliance with authorization conditions regarding procedures and failure to act honestly and professionally in accordance with the best interest of the clients. (smnweekly.com)