Background: Judo Bank was founded in 2016 by former National Australia Bank bankers who thought Australia's Big Four banks... were ignoring small businesses. After five years of rapid growth, Judo listed on the ASX with a market value of just over $2.5 billion. Despite holding a full banking license, Judo is unusual in that it focuses exclusively on business lending, with a loan book of around $15 billion.

What happened: Judo's share price plunged almost 40% in a single day after the bank announced a sharp profit downgrade. And that downgrade came after three business loans turned bad almost simultaneously. The troubled loans came from three unrelated businesses: a blind manufacturer, a financial planning firm, and a construction services company.

What else: Judo insisted these were isolated incidents rather than a broader systemic issue. But investors weren't convinced. Shares plummeted 40% in one session. So now, the bigger concern is whether these defaults are early warning signs of deeper stress across Australia's small and medium-sized business sector.  

What's the key learning?

💡 When an SME bank starts bleeding, investors start to check the pulse of the bigger banks. Judo only lends to SME's, making it more exposed to SME weakness than traditional banks. This makes it a useful signal of what's going on with the broader economy.  

💡SME lending is also generally riskier than home lending. Small businesses make up around 98% of all businesses in Australia. And the businesses in this market are very exposed to rate rises, fuel prices and declines in consumer confidence.

💡 With all of the above happening over the past three months, investors quickly priced in that risk. In anticipation, National Australia Bank saw a share price drop of 4%... while Commonwealth Bank and Westpac saw their shares drop 1-2% too.