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How diversification builds resilience in banking

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3 min read
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Since the 2008 global financial crisis, the concept of banks diversifying their operations has sometimes been met with skepticism. Critics warned that expanding into new products, sectors, or geographies could make institutions too complex to manage and too interconnected to fail—ultimately increasing systemic risk. As a result, many banks chose to streamline operations and double down on their core competencies.

But today’s economic landscape, marked by inflation, geopolitical instability, and technological change, demands a different approach. In this environment, diversification isn’t a liability; it’s a safeguard. Banks that diversify across customer segments, lending categories, income streams, geographies, and digital platforms are not courting fragility, but insulating themselves against it.

What happens when banks lean into diversification

A report from the Wharton School at the University of Pennsylvania highlights how diversification, in its many forms, may enhance a bank’s stability and ability to weather economic shocks.

Wharton finance professor Itay Goldstein, along with Michael Gelman (University of Delaware) and Andrew MacKinlay (Virginia Tech), analyzed U.S. bank diversification around the 2008 crisis. Their research found that banks that had already expanded beyond their original geographic and typical lending business boundaries were better positioned to sustain higher levels of lending, reduce risk, and stabilize revenue streams during the downturn.

The study, which examined lending trends from 1997 to 2017, revealed that diversified banks were more resilient and continued lending throughout the crisis. In fact, they were able to sustain higher levels of lending activity during the downturn, especially to small businesses.

Small businesses received more than twice as many loans from the most diversified banks compared to the least diversified. These loans played a critical role in helping businesses retain employees and create new jobs in local communities.

Interestingly, when diversified banks expanded into new markets or product areas, the broader banking sector didn’t suffer. On the contrary, the overall economic impact was largely positive.

3 strategies to leverage bank diversification

The 2008 crisis proved that diversification can be a powerful tool for stability. As banks navigate today’s uncertainties, these three strategies can help boost lending, minimize risk, and stabilize revenue:

  1. Expand into New Business Segments
    Diversifying into non-lending activities—such as insurance, securities, investment banking, and trust services—can strengthen a bank’s ability to lend during economic stress. Insurance lines, in particular, have shown strong performance during financial crises.

  2. Broaden Geographic Reach
    Lending across more counties or states enables banks to maintain higher lending levels during downturns. The most geographically diversified banks lent twice as much to small businesses during the 2008 crisis compared to their less diversified peers.

  3. Invest in Consumer Credit as an Asset Class
    Short-duration investments like personal loans offer attractive returns with lower risk than long-dated assets. Allocating capital to non-mortgage consumer credit can help banks diversify their balance sheets and improve resilience.

Spotlight: personal loans are a growing asset class

Personal loans are emerging as a compelling sub-asset class within consumer credit, offering access to a $251 billion market. With shorter durations and higher yields than traditional fixed-income assets, personal loans can deliver strong earnings—even in a high-interest rate environment.

While long-duration, lower-yielding assets will remain part of most portfolios, personal loans offer a unique opportunity for banks to diversify and strengthen their investment strategies amid regulatory and economic uncertainty.

The takeaway

There’s no crystal ball to predict the future of the economy or the banking sector. But one thing is clear: banks must prepare for turbulence. Once viewed with caution, diversification has proven to be a powerful force for stability.

As the Wharton study shows, diversified banks not only weathered the 2008 crisis—they helped fuel recovery. By embracing diversification across lending, geography, and investments, banks can reduce risk, support multiple local economies, and build the resilience needed to thrive in any economic climate.

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