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> to AA+ from AAA Btw, what's up with the scale? Wasn't A good enough at some point, and they made A+, then later AA etc.? What would happen if someone decided

> to AA+ from AAA Btw, what's up with the scale? Wasn't A good enough at some point, and they made A+, then later AA etc.? What would happen if someone decided AAA+ is the new best and all the AAAs are now not at the top anymore?

mbg721 3y ago
Where are S1, S2, etc?
pavlov 3y ago
The high-level scale is from A to D, and each grade above D is further split into three (C, CC, CCC etc.) with an additional +/- modifier at each step except AAA. That makes 25 grades above D if I’m not mistaken.