I understand the question. Yes. So the first thing I'll say is a decent portion of the book value issues over the past three quarters was around the deferred tax asset. That's number one. So you'd have to, from my perspective, separate that out from the rest of the performance over the last couple quarters. And I believe that was somewhere around 7%, or something of the 70% of the book value loss in the third quarter. Relative to that, I would say, within the servicing space, I think that the servicing behavioral models were have been slow to change over the course of the last nine months relative to just actually seeing the speeds come in. And so that's one thing that's difficult to hedge for, because can't anticipate changes and behavioral models, relative to how the third-party evaluators think about the asset. In the fourth quarter as both I and Julian noted, the mix became, just a little bit more difficult relative to things around pay up stories and just speeds. And if I were to answer your question, just very short, I would say given the absolute low level of rates and given a degree of refinance ability within the servicing portfolio, and the fact that originators have enjoyed incredibly high margins over the last, let's just call it nine months or so that has been a dynamic that broadly speaking over the last seven years we have not seen or dealt with because in a normal environment, when rates move, because the originators should have fully included all of that into their margins at the time, they would move their rates in tandem with real rates moving treasury rate, right. And so what we've found and you can see it just in terms of looking at the primary secondary spread is that it's been, it widened and then tightened. And, broadly speaking, the originators had a lot of wiggle room before they needed to change rates just based on the amount of low hanging fruit. And I think that once you get to a certain point in the 10 year, whether that's 151, 175 that number, is coming up quickly, whereas we've seen and you've seen originators feel the need to adjust their origination rates and their primary rate to compensate for the loss and margin. And, Ray, correct me if I'm wrong, but we're definitely starting to see that. And I believe that once you hit a number, somewhere between once 150 and 175 in 10 year, you'll start to see a more normalized environment where originators will start to move the primary rate in a manner that's more consistent with historical norms. But you're absolutely right, last year was just based on the absolute level that rates hit on the low side, and the absolute historic margins that you've seen, covering the originators, it created a dynamic that we had not seen.