Ken. It's Eric. Sure. Let me describe first maybe third quarter to the fourth quarter to give you some context, and then fourth quarter to first quarter and then kind of see what we see from there. Going into the fourth quarter, we have the usual headwinds from investment -- from the investment portfolio and actually higher premium amortization than we've had previously, and that would cost us sequentially about $35 million. That's kind of the headwind. Now, that will come back to, because that headwind is attenuating each quarter, but that was a headwind. Against that headwind in the fourth quarter, we had some unusual benefits. We had the FX swap mark-to-market, which was about $5. We had a surge in deposits, both in developed markets and in emerging markets. Remember, they're valuable in emerging markets worth about $10 as a tailwind. And then we built our investment portfolio and added quite a bit of loans at the tune of about $20 million. Now, that was a larger bill than usual, but a better remunerated plan. And so, those are the kind of features that held us flat in effect from 3Q to 4Q. I think if we go into first quarter, you kind of take each of those in pieces, the investment portfolio, headwind, it's probably going to be about $25 million instead of $35 million. So you see it attenuate. And part of that is that the prepayment speeds are neutral we think from 4Q to 1Q. We have some tailwinds of deposits and loans and investments, but that's probably worth about 10 bucks. And then we still have a couple headwinds, we have the unwind of the swap mark-to-market which sequentially is worth 10, because you got to double up the positive turns negative. And then you have day count worth another 10 as a headwind. So that's kind of what gets us to the guide that we gave. Once we get through the first quarter, I think what we expect to see is that stabilization and what we're effectively expecting is that the investment portfolio headwind which was $35 million, but coming $25 million, it's going to start to trend down to $10 million a quarter. And why is that partly rates have been kind of working through the on the yield side and partly because prepayment speeds we expect to start to attenuate as we see higher rates. And so, we do expect some lesser headwinds. And against that, we think that the actions that we take on a more traditional basis will be worth about plus 10. And so it will be roughly neutral and stable from 1Q to 2Q and 2Q to 3Q and so forth. Obviously, it'll be range bound. And obviously, it'll be -- there's always a little bit of lumpiness that we get into, but that's our best estimate of what we're seeing today, based on the curves, the expectations of rates and so forth.