Analysts covering Exeter Auto Finance forecast net interest margin stability around 6.1% in One of the largest warehouses under construction in Delaware is nearing completion. Also, CarMax loans as a percentage of the portfolio decreased to 20.3%, from 27.0%, which is notable because they usually perform better than Exeter's core originations, S&P said. Securitization specialists note Exeter Auto Finance’s collateral pools are diversified geographically, helping mitigate localized economic shocks that could otherwise impact asset quality.