Even though they are among the most valuable financial stocks, these three look like bargains.

When you think about megacap stocks, the financial sector might not be the first thing that comes to mind. And that certainly makes sense. After all, the largest companies in the market are almost all from the tech industry.

However, you might be surprised at how large some financial companies have become. We recently had a financial sector stock become the first non-technology company to reach a trillion-dollar valuation, and the largest U.S. bank could certainly join the trillion-dollar club within a few years with decent stock performance.

According to The Motley Fool's recent research, the largest financial stocks based in the United States, ranked by market cap, are:

Berkshire Hathaway

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