Gary Gensler

Congress has provided for such rules since the 1930s to ensure that no single trader has too large a share of the market and that agricultural, energy and metals markets remain fair and competitive.

Senator Sanders should go beyond his existing plans for reforming Wall Street and endorse Hillary Clinton's tough, comprehensive proposals to rein in risky behavior within the shadow banking sector.

Any plan to further reform our financial system must include strong provisions to tackle risks in the 'shadow banking' sector, which remains a critical source of potential instability in our economy, unfortunately, Sen. Sanders has so far taken a hands-off approach to some of the riskiest institutions and activities in our economy, which were among the biggest culprits during the 2008 crisis.

Any plan to further reform our financial system must include strong provisions to tackle risks in the ‘shadow banking’ sector, which remains a critical source of instability in our economy.