Wasn't CECL Supposed to Prevent Big Adjustments to Reserves?
Yes and No. CECL's intent was to quantify the risk in the portfolio at a given date. Implicit in that is a set of assumptions on the health of the economy and how it will impact customer delinquency and losses. Clearly the 2020 covid-19 recession saw a dramatic spike in unemployment. Small business are hurting with many likely to go out of business. It's hard to know whether banks have been able to capture all of the risk in their portfolio given that we don't know how long the recession will continue until things return to 'normal'.
It's unlikely anyone was forecasting a recession like 2020's. But it still seems that economic assumptions should stress test a range of outcomes. While not likely it was always possible. Just not likely. Or not at all likely. But with some bank's reserve percentage almost doubling it seems they didn't take into account much of a downturn occurring at any time over the life of their portfolios. That seems to have missed the point.
The idea of quantifying the risk in the portfolio still makes sense. But it does come down to what assumptions are reasonably expected. It's hard to judge the initial CECL reserve setting given we have the benefit of retrospect. But it's a lesson that other lenders should take into account as they adopt CECL over the next several years.