First, there isn’t “a credit system in America.” That is, there is no national standard to determine loan worthiness. There are a handful of private firms who do credit reporting. Equifax, Esperian and TransUnion are the best known. (And I think Experian isn’t even “American” per se.)
These firms sell–among other things–a rating system that helps lenders decide how likely someone is to default on a loan, and as mentioned above, they are looking at correlations typically, rather than individual situations. Folks that are often late on payments are more likely to default, even though a given individual might be often late because she is discombobled about how she pays her bills.
Because these firms sell a proprietary service, they are loathe to give out their exact formulas. I’m a typical geezer who has become obsessed with keeping my scores above 800, and I completely agree that in the credit “system” many things become counter-intuitive.
The credit-rating scoring used does not look at your balance sheet, which would be the most intuitive “system” for most people (along with their debt/payment history). The credit agencies have no way of knowing that you have $20M in Apple stock and are good for any loan you make. They are focusing on one thing, really: What is your payment history? They also look at a second thing: What is your total line of credit compared with how much of it you are using? A person who has tons of credit lines, uses almost none of it, and always pays off outstanding balances every month might have better credit scores than a rich guy with one CC. The rich guy would still have an easier time getting a loan, because a credit score is only one data point on a loan application. I just want that 850 so I can frame it (and I’m wondering if that really is the top number…)
If you had an outstanding car loan with a great payment history and a balance of 3K on an original 25K line, and you close out the loan, in theory your credit score might dip a little because you now have 22K less credit line than you had before, and one measure is how much of your total credit line you are actually using. If you are making a dozen actual credit applications and get all those “hard” inquiries, that’s a red flag too. Both those are kind of counter intuitive. I’ve also been burned by putting everything on a CC (to get points) and then paying it off monthly; the CC report says my monthly balance was too high, even though I paid it off every month. Ridiculous. (I finally got around that by paying off my CC balance every few days electronically).
Net net, though I think the system works OK. I’m obsessed with trying to get my scores to the very top, but I am beginning to think it is not possible. I agree that anything over 800 more or less gets you the best loan deals, assuming your balance sheet is clean, but since we don’t have any loans, that doesn’t help me.