But the Fed revised credit union numbers for those months upwards by about 1% for credit unions, but making no changes to bank numbers. (They shaved about 1% from finance companies for April and May, but those numbers are small.)

With the revisions, the story changes: Credit unions tracked bank growth closely from March through May.

Credit unions' gain for the 12 months ending June 30 was 1.1 percentage points better than banks. But looking at the past, it is quite possible banks could leap ahead by a similar amount in July.

The overarching pattern is that bank and credit union balances have been following very similar trends, and changes in market share have been slight.

The G-19 showed credit unions held $83 billion in credit card debt on June 30, up 7.7% from a year earlier and up 0.9% from May to June, matching their 10-year average May-to-June gain. Credit unions' share was 6.4% in June, up slightly from 6.3% both a year earlier and in May.

Banks held $1.2 trillion in credit card debt, up 6.6% from a year earlier and up 0.2% from May to June, compared with the 10-year average gain of 0.9%. Banks' share was 90.7% in June, unchanged from May and up from 90.4% a year ago.

The monthly reports from Velera, the largest payments CUSO, have shown a similar trend based on balances among its pool of credit unions, which excludes the largest credit unions that handle their own payments. It showed 12-month gains shrinking from a high of 14% in April 2023 to 5.1% in May, then rising to 5.5% in June.

Meanwhile, the Fed's monthly G-19 cast some shade on credit union auto lending. Monthly estimates from the America's Credit Unions trade group have shown flat or declining auto loan balances at credit unions this year. The question has been whether credit unions were suffering with or worse than banks and others.

Every three months, the G-19 report includes the total balance of U.S. motor vehicle loans outstanding among all lenders and investors. While it doesn't report balances by credit unions or other lender types, the G-19 total can be compared with credit union data from other sources.

In this case, the total balances were compared with NCUA data from Callahan's Peer Suite.

The NCUA data showed that credit unions held $493.9 billion in car loans June 30, down 1.5% from a year earlier and down 0.6% from March. Credit union balances have been falling quarter-to-quarter since September.

Credit unions held 31.6% of the nation's total car loan portfolio June 30, down from 32.0% three months earlier and 32.7% 12 months earlier.

Subtracting the NCUA data from the G-19 showed balances among other lenders rose 3.6% from a year earlier and rose 1.3% from March.

NCUA data showed credit union auto loans are being driven down by the lower volume of new car loans.

New car loans were $170.3 billion as of June 30, down 4.3% from a year earlier, and down 1.5% from March.

Used car loans were $323.6 billion, unchanged from a year earlier and down 0.1% from March.

Channel seemed to matter less. While new cars are typically associated with indirect lending, the total indirect balance shows a substantial number are used.

Credit unions held $271.6 billion in indirect auto loans June 30, down 2.7% from a year earlier and down 0.2% from March. Direct loans were $222.3 billion in June, about the same as a year ago and down 1% from March.