“Throughout history, the moneylenders have always been viewed with suspicion,” Jeff Yass told a student group dedicated to the promotion of free markets in 2021. “When you’re against finance, you’re fundamentally against all human progress.” Yass is a founder of Susquehanna International Group, the trading and securities giant. A 2024 profile by The Financial Times found that, on a given day, Susquehanna’s gross exposure across all its long and short positions is upward of half a trillion dollars. And like most global financial titans, there is a strong Irish link. One Irish subsidiary, Susquehanna International Securities, made trading gains in…

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