Hungarian-American entrepreneur who founded Interactive Brokers — one of the world's largest electronic brokerages — by bringing computer-driven options pricing to the trading floor when everyone else was using mental math, then building the electronic trading infrastructure that democratized global market access.
Built the first electronic options pricing system on the trading floor — using a hand-held computer when regulators required him to remove it — and then built Interactive Brokers as the lowest-cost broker for sophisticated traders, democratizing access to global markets.
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