The big four U.S. banks, including Bank of America (NYSE:BAC) and Citigroup (NYSE:C), hold nearly $8 trillion worth of assets on their books. Even after regulations aimed at ending too-big-to-fail banks, many people believe more needs to be done. Unveiled this week, a new proposed tax plans aims to impose a new tax on banks that exceed a certain threshold.

In this segment of The Motley Fool's financials-focused show, Where the Money Is, banking analysts Matt Koppenheffer and David Hanson discuss the plan and the likelihood of its passing. Matt believes the tax would create a lack of transparency in the shadow banking system as banks try to reduce the amount of assets on their books.

David Hanson owns shares of JPMorgan Chase. Matt Koppenheffer owns shares of Bank of America, Citigroup, and JPMorgan Chase. The Motley Fool recommends Bank of America and Wells Fargo. The Motley Fool owns shares of Bank of America, Citigroup, JPMorgan Chase, and Wells Fargo. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.