1 Reason Janet Yellen Is Worried

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While the economy seems to be headed in the right direction, the chairwoman of the Federal Reserve is worried that uncertainty surrounding domestic and global issues could impede its progress.

What Yellen just said

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In testimony this week before the House Financial Services Committee, Federal Reserve Chairwoman Janet Yellen sounded a generally optimistic tone about the economy, while at the same time musing about the uncertainty of its direction:

As Yellen points out, there's always uncertainty in the markets. What seems to have her concerned now, though, is both the degree of uncertainty, as well as the impact it may have on the economy.

Slowing loan growth

No metric demonstrates this better than the growth rate of commercial and industrial loans, or C&I loans. These are bread-and-butter loans to businesses, providing funds to start and expand. It's worth distinguishing them from commercial real estate loans, which finance the purchase and/or development of commercial property.

The outstanding balance of domestic C&I loans has dropped considerably over the past few months, as you can see in the chart below. After expanding at an average rate of 10.6% from the beginning of 2012 through the end of 2016, the rate dropped in May to 2%, according to data from the Federal Reserve.

This matters because loans, C&I loans in particular, fuel the economy. When businesses are optimistic, they invest and expand, typically with the help of bank financing. When businesses are pessimistic, they do the opposite.

It's impossible to say if the recent downturn in demand for C&I loans is temporary or instead early evidence that the economy is decelerating. But it's not a good sign either way, and it's something that investors, especially those in bank stocks, will want to watch closely.

Loan growth at big banks

You can see these trends reflected in the way the nation's largest banks report their loan growth figures. In the first quarter, Bank of America (NYSE: BAC) said that average loan balances in its operating segments rose $44 billion, or 6%, to $819 billion. But interestingly, if you factor in the loan portfolios in Bank of America's non-operating units, the size of its aggregate loan portfolio actually declined slightly between the end of last year and the end of the first quarter, dropping $441 million.

The story was similar at JPMorgan Chase (NYSE: JPM). Its average core loans grew 9% on a year-over-year basis in the three months ended March 31, though that figure fell to 1% when compared to JPMorgan Chase's core loans in the fourth quarter of last year. And if you look at JPMorgan Chase's entire loan portfolio, not just its core loans, that figure grew only 0.14% from the final quarter of 2016 through the first quarter of 2017.

Consequently, while the non-GAAP, top-line numbers at these banks paint an optimistic picture, the reality is that credit expansion has slowed considerably over the past few months. Because loans are the principal product that banks sell, this is something investors in banks like Bank of America, JPMorgan Chase, and others will want to watch closely.

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John Maxfield owns shares of Bank of America. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.