NEW YORK (TheStreet) -- If you think the banking system will help the economy continue to grow, buy one of the four "too big to fail" banksBank of America (BAC) - Get Report , Citigroup (C) - Get Report , JPMorgan Chase  (JPM) - Get Report and Wells Fargo (WFC) - Get Report .

Third-quarter GDP is growing at a stronger-than-expected annual rate of 3.9%. Data from the Federal Deposit Insurance Corporation show quarterly earnings rose by 7.3% year over year in the third quarter. The four "too big to fail" banks control 43% of all assets in the banking system, making them the investments of choice.

Bank of America ($17.15) is trading above its 200-day simple moving average at $16.17. The weekly chart is positive but overbought with the key weekly moving average at $16.96. Investors should enter a "good 'til canceled" limit order to buy weakness to the 200-day SMA at $16.17. Investors looking to book profits should enter a "good 'til canceled" limit order to sell strength to a key technical level at $20.75.

Citigroup ($54.36) is trading above its 200-day simple moving average at $49.67. The weekly chart is positive but overbought with the key weekly moving average at $53.10. Investors should enter a "good 'til canceled" limit order to buy weakness to the 200-day SMA at $49.67. Investors looking to book profits should enter a "good 'til canceled" limit order to sell strength to a key technical level at $63.50.

JPMorgan Chase ($61.08) is trading above its 200-day simple moving average at $57.98 with its all-time intraday high at $61.93 set on Nov. 10. The weekly chart is positive with the key weekly moving average at $60.10. Investors should enter a "good 'til canceled" limit order to buy weakness to the 200-day SMA at $57.98. Investors looking to book profits should enter a "good 'til canceled" limit order to sell strength to a key technical level at $69.50.

Wells Fargo ($54.22) is trading above its 200-day simple moving average at $50.67 with its all-time intraday high at $54.74 set on Nov. 28. The weekly chart is positive but overbought with the key weekly moving average at $53.15. Investors should enter a "good 'til canceled" limit order to buy weakness to the 200-day SMA at $50.67. Investors looking to book profits should enter a "good 'til canceled" limit order to sell strength to a key technical level at $55.90.

Here's what to keep in mind when considering investing in these banks.

Of importance is that 63% of all banks reported year-over-year improvement in quarterly net income versus 50% a year ago. While still high by historical standards, the FDIC non-list of problem banks fell to 329 from 354 sequentially and assets among these institutions declined to $102.3 billion from $110.2 billion.

The key to economic growth on Main Street USA is the housing market. Here's the important data on real estate lending. This information shows that the banking system is not fully healed.

Residential Mortgages (one- to four-family structures) -- down 18% since the end of 2007 to $1.838 trillion. These are loans on the books of the FDIC-insured financial institutions. This statistic still shows that home buyers are having difficulty in getting approved for a mortgage.

Nonfarm/Nonresidential Real Estate Loans -- higher by 17% since the end of 2007 to $1.333 trillion as regional and community banks continue to lend for the construction of office buildings, strip malls, apartment buildings and condos.

Construction & Development Loans -- down 63% to $230.6 billion as loans to finance planned communities and homebuilders proved to be the Achilles Heel for community banks. This loan category stabilized since bottoming at $201.6 billion in the first quarter of 2013. Much of the increases have resulted in community development and the building of new homes on speculation.

Home Equity Loans -- down 18% since the end of 2007 to $496.2 billion. Despite the increase in home values banks are reluctant to increase second-lien loans in an uncertain housing recovery.

Total Real Estate Loans -- down 17%, or $751.8 billion since the end of 2007 to $3.698 trillion which is a key sign that banks are not ready to aggressively rebuild their core business, supporting the housing market on Main Street, USA.

Other Real Estate Owned has been declining in recent quarters but at $24.9 billion is still up 105% since the end of 2007. OREO peaked at $53.2 billion in the third quarter of 2010.

So the U.S. economy is showing signs of life thanks to a healing banking system, but symptoms of the "Great Credit Crunch" that began at the end of 2007 are still problems on Main Street, USA.

At the time of publication, the author held no positions in any of the stocks mentioned.

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This article is commentary by an independent contributor, separate from TheStreet's regular news coverage.

TheStreet Ratings team rates CITIGROUP INC as a Buy with a ratings score of B. TheStreet Ratings Team has this to say about their recommendation:

"We rate CITIGROUP INC (C) a BUY. This is driven by a number of strengths, which we believe should have a greater impact than any weaknesses, and should give investors a better performance opportunity than most stocks we cover. The company's strengths can be seen in multiple areas, such as its revenue growth, attractive valuation levels and expanding profit margins. We feel these strengths outweigh the fact that the company has had sub par growth in net income."

You can view the full analysis from the report here: C Ratings Report