I'm going to start with Bagehot the title of the lecture is The World That Bagehot Knew. You've now all read Bagehot or at least two chapters of Bagehot so you have some sense of this I'm now going to sort of do the economics of that. Alright. So let me start with a an example. The world that Bagehot is talking about. this is all going to be about Bagehot. It's all going to be about 19th century banking. But it's going to be very relevant for what we, for what we do later on. It's just simpler in the 19th century. Okay. So we'll be, be trying to move this stuff. Into the 21st century in the next couple of lectures but for now we are in Bagehot's world. The world that Bagehot now, we are thinking about firms that are making payments to each other. And the example that I'm starting with here is that firm A is buying goods from firm B. [SOUND] And the example that I'm starting with here is that, firm A is buying goods from firm B. So you might think of firm A as a retail firm maybe okay and maybe this is a wholesale or maybe a producer, maybe a manufacturer You want to, make it concrete. Since this is, since this is Britain, you could think that, here, this is a, this is a firm that produces woolen yarn or, or, or, or cloth or something, or clothing. And this is a firm that's selling it. Or selling it on, later on in the production chain. So, there's a production chain. And these firms are linked in this production chain by buying and selling intermediate goods with, with, between each other. So, again, this isn't retail in the sense that it's you and me buying. This is business. Okay? And so it's going to be the whoesale money market again that we're talking about. Firm A is buying goods. From Firm B. So, these goods were assets of Firm B and it's selling them, okay? And it's buying them on credit, okay. It's promising to pay Firm B and, and what it does is, it, now it has the goods, it treats these goods as. As collateral for borrowing. So it, it issues what's called a bill of exchange. as a dept of Firm A, and as an asset of Firm B. [SOUND] It's a kind of trade credit, okay? It's a promise to pay in 90 days. It's a promise to pay in 90 days. But it is very specifically referencing these goods, this transaction. That's the point, okay. The whole idea is, the whole idea behind this, is that in 90 days from now these goods will be sold, okay. And so firm A will have cash in order to make this payment. But right now firm A doesn't have that cash, and so he, he's borrowing essentially. From firm B. He is getting the goods but he is not actually paying for them. Right now, this is how all business to business transactions work even to this day. Okay, people buy goods, bury promising to pay in 90 days or something like that. And there is good, and there is bill receivable. Now firm, now fir, so firm A has what they want so fine. Now firm B has this bill of exchange and he may need cash himself. Oka? So, the way banks enter this, enter this picture at least at first, is firm B can take the bill of exchange to a bank and discount it. and so we will treat that as a purchase of the bill of exchange, and a purchase with bank notes. Okay. So, minus bill, plus notes. So see what's happened here. Firm A has bought goods, and hasn't paid for them. Firm B has sold goods, and now has been paid for them. He's got notes. He's actually been paid. He's all done. Okay? This bank has made the payment, okay, and now has a promissory note, a promise, from Firm A, okay. It's now Firm A that is supposed to pay the bank, not pay Firm B. In 90 days. So the bank has an earning asset here. Now I said that the bank buys that bill of exchange, the point is that it, it buys at a discount. So there is an, that discount, a discount to face value [SOUND]. So there is an interest rate involved here. Okay, so if the bill was for 100, you might buy it for 95. That's an exaggeration, it would actually be closer, closer to 100. and so in 90 days you earn 5% in interest, that's a pretty good interest for 90 days, in that case, if it were [UNKNOWN] at 95. That's the way the discount here works. So far, so good. The idea Of all of this, as I say, is that 90 days from now this is going to happen, okay. This firm is going to sell the goods, okay and to some customer and get some notes, okay. Which it can use to redeem the bill. [NOISE] So again just to be clear, this minus goods plus notes, this is referring to a balance sheet of some customer that we aren't showing Okay? This minus notes minus bill, that's, that's these same things here on the, on the bank's balance sheet. So this is the idea of this transaction. This is the basic discount mechanism, the way in which firms are making payments to each other with the help of, of a bank that is willing to discount by paying out notes. Okay. Now. I'm, I'm showing the bank as paying out notes. And let's shift our focus now to the bank. I'm showing the bank as paying out notes so that you appreciate what the danger of this business is. And what the opportunity, and what the danger is. The opportunity is, you're getting rid of an asset. Bank notes. That doesn't pay interest. And you're acquiring an asset, a bill of exchange, that does pay interest. Good thing. That's nice. On the other hand, you're getting rid of an asset that is a means of payment. Okay? And you're, and you're acquiring an asset that is not. That, that only pays in 90 days. And, and they don't have, nobody is promising to do anything for 90 days. In 90 days, this will turn into cash, hopefully. Okay. But until then, nothing. So, there's a liquidity risk involved here, a payment risk. This bank is, has deposit accounts, over here. OK and if somebody was withdrawing a deposit or transferring it to another bank You know, this bank may need these notes, you know, to make that payment. They're, they're reserves, these are the banks reserves. So this could be a problem. [BLANK_AUDIO]