Prop stop: SEC plan to register prop trading threatens liquidity

Rule change may also be a crypto landgrab by SEC chairman Gensler, critics say

There’s high dudgeon in high-frequency trading circles, where a plan by the Securities and Exchange Commission to make more non-bank proprietary trading firms register as dealers – and with the Financial Industry Regulation Authority (Finra) as broker-dealers – is causing alarm.

The proposal could dampen liquidity in fixed income and equity markets, its critics argue – just as volatility is surging – driving some proprietary trading firms (PTFs) out of the market and deterring new and smaller

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