It’s never easy moving jobs in the Square Mile

It’s never easy moving jobs in the Square Mile – especially for the higher ups. Once you reach a certain seniority, your employer frets over the threat posed if you jump ship – what strategic information you could take with you.

That was true for a London-based quant firm called G-Research, after one of its employees, Pierre Allain, handed in his notice.

When Allain quit in March, G-Research put him on 12-months’ paid garden leave, such were their concerns over his knowledge of their secret trading strategies. What happened next is very much in dispute and Allain emphatically denies any wrongdoing.

Allain had been offered his dream job, to be a quant trader at the mighty Citadel – with a hefty pay rise to boot (or not, depending on who you

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