The multi-billionaire moved to Miami last year, where there is no tax on share sales above $250,000.
Multi-billionaire Jeff Bezos has sold more of his shares in Amazon, bringing the total value of sales in recent days to more than $4bn .
When he announced the move, it prompted speculation over whether it was because of a potential tax bill he would have faced in Washington after the state approved a new tax on large stock sales.
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