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Why can I refinance my recent car loan at a lower rate than I had received originally?
The simple answer might just be that the increased credit score you mentioned was enough to suddenly make you eligible for this lenders better rate, so maybe that's why you weren't able to get that low a rate before. Another option I can think of is that this particular bank offers these loans as a "teaser rate" to hopefully get more of your business later on. It's not exactly a loss leader I would think, given the non-existing deposit rates they're probably still able to make money on the spread but they might be able to undercut other banks enough to get their hooks into you. Figuratively speaking, of course. Of course in order to evaluate if it's worth switching to this deal, you'll also have to look at prepayment penalties and fees on your current loan. These extra costs might be enough to make the switch uneconomic.