Chapter One
What are Banks and What Do They Do?
1.1. Introduction
The term "banking" can be applied to a large range of financial institutions, from savings and loans organisations to the large money-centre commercial banks in the USA, or from the smallest mutually owned building society to the "big four" shareholder owned banks in the UK. Many European countries have large regional/cooperative banks in addition to three to five universal banks. In Japan, the bank with the largest retail network is Sumitomo Mitsui Banking Corporation, but its main rival for savings deposits is the Post Office.
The objective of this chapter is to provide an overview of banking and the role played by banks in an increasingly complex financial world. It begins with a review of the meaning of banking, identifying the features of banks that distinguish them from other financial institutions. The most common forms of organisational structure for banks in the developed world are reviewed in section 1.3. Section 1.4 considers the relationship between the central banks and commercial banks, including key debates on the functions and independence of a central bank. The chapter ends with a brief summary of the major theoretical contributions to the banking literature, followed by conclusions.
1.2. The Meaning of Banking
The provision of deposit and loan products normally distinguishes banks from other types of financial firms. Deposit products pay out money on demand or after some notice. Deposits are liabilities for banks, which must be managed if the bank is to maximise profit. Likewise, they manage the assets created by lending. Thus, the core activity is to act as intermediaries between depositors and borrowers. Other financial institutions, such as stockbrokers, are also intermediaries between buyers and sellers of shares, but it is the taking of deposits and the granting of loans that singles out a bank, though many offer other financial services.
To illustrate the traditional intermediary function of a bank, consider Figure 1.1, a simple model of the deposit and credit markets. On the vertical axis is the rate of interest (i); the volume of deposits/loans appears on the horizontal axis. Assume the interest rate is exogenously given. In this case, the bank faces an upward-sloping supply of deposits curve ([S.sub.D]). There is also the bank's supply of loans curve ([S.sub.L]), showing that the bank will offer more loans as interest rates rise.
In Figure 1.1, [D.sub.L] is the demand for loans, which falls as interest rates increase. In Figure 1.1, i* is the market clearing interest rate, that is, the interest rate that would prevail in a perfectly competitive market with no intermediation costs associated with bringing borrower and lender together. The volume of business is shown as 0B. However, there are intermediation costs, including search, verification, monitoring and enforcement costs, incurred by banks looking to establish the creditworthiness of potential borrowers. The lender has to estimate the riskiness of the borrower and charge a premium plus the cost of the risk assessment. Thus, in equilibrium, the bank pays a deposit rate of [i.sub.D] and charges a loan rate of [i.sub.L]. The volume of deposits is 0T and 0T loans are supplied. The interest margin is equal to [i.sub.L] - [i.sub.D] and covers the institution's intermediation costs, the cost of capital, the risk premium charged on loans, tax payments and the institution's profits. Market structure is also important: the greater the competition for loans and deposits, the more narrow the interest margin.
Intermediation costs will also include the cost of administration and other transactions costs related to the savings and loans products offered by the bank. Unlike individual agents, where the cost of finding a potential lender or borrower is very high, a bank may be able to achieve scale economies in these transactions costs; that is, given the large number of savings and deposit products offered, the related transactions costs are either constant or falling.
Unlike the individual lender, the bank enjoys information economies of scope in lending decisions because of access to privileged information on current and potential borrowers with accounts at the bank. It is normally not possible to bundle up and sell this information, so banks use it internally to increase the size of their loan portfolio. Thus, compared to depositors trying to lend funds directly, banks can pool a portfolio of assets with less risk of default, for a given expected return.
Provided a bank can act as intermediary at the lowest possible cost, there will be a demand for its services. For example, some banks have lost out on lending to highly rated corporations because these firms find they can raise funds more cheaply by issuing bonds. Nonetheless, even the most highly rated corporations use bank loans as part of their external financing, because a loan agreement acts as a signal to financial markets and suppliers that the borrower is creditworthy (Stiglitz and Weiss, 1988).
The second core activity of banks is to offer liquidity to their customers. Depositors, borrowers and lenders have different liquidity preferences. Customers expect to be able to withdraw deposits from current accounts at any time. Typically, firms in the business sector want to borrow funds and repay them in line with the expected returns of an investment project, which may not be realised for several years after the investment. By lending funds, savers are actually agreeing to forgo present consumption in favour of consumption at some date in the future.
Perhaps more important, the liquidity preferences may change over time because of unexpected events. If customers make term deposits with a fixed term of maturity (e.g., 3 or 6 months), they expect to be able to withdraw them on demand, in exchange for paying an interest penalty. Likewise, borrowers anticipate being allowed to repay a loan early, or subject to a satisfactory credit screen, rolling over a loan. If banks are able to pool a large number of borrowers and savers, the liquidity demands of both parties will be met. Liquidity is therefore an important service that a bank offers its customers. Again, it differentiates banks from other financial firms offering near-bank and non-bank financial products, such as unit trusts, insurance and real estate services. It also explains why banks are singled out for prudential regulation; the claims on a bank function as money, hence there is a "public good" element to the services banks offer.
By pooling assets and liabilities, banks are said to be engaging in asset transformation, i.e., transforming the value of the assets and liabilities. This activity is not unique to banks. Insurance firms also pool assets. Likewise, mutual funds or unit trusts pool together a large number of assets, allowing investors to benefit from the effects of diversification they could not enjoy if they undertook to invest in the same portfolio of assets. There is, however, one aspect of asset transformation that is unique to banks. They offer savings products with a short maturity (even instant notice), and enter into a loan agreement with borrowers, to be repaid at some future date. Loans are a type of finance not available on organised markets.
Many banking services have non-price features associated with them. A current account may pay some interest on the deposit, and offer the client a direct debit card and cheque book. The bank could charge for each of these services, but many recoup the cost of these "non-price" features by reducing the deposit rate paid. On the other hand, in exchange for a customer taking out a term deposit (leaving the deposit in the bank for an agreed period of time, such as 60 days or one year), the customer is paid a higher deposit rate. If the customer withdraws the money before then, an interest penalty is imposed. Likewise, if customers repay their mortgages early, they may be charged for the early redemption.
Figure 1.1 does not allow for the other activities most modern banks undertake, such as off-balance sheet and fee for service business. However, the same principle applies. Figure 1.2 shows the demand and supply curve for a fee-based product, which can be anything from deposit box facilities to arranging a syndicated loan. The demand and supply curves are like any other product, and the market clearing price, P, is determined by the intersection of the demand and supply curves. Again, market structure will determine how competitive the price is. Banks will operate in other "non-banking" financial markets provided they can create and sustain a competitive advantage in each of them.
Banks do not necessarily charge a direct price for their services, as suggested by Figure 1.2. Many modern banks offer stockbroking services to their customers, and "make markets" in certain equities. In this case, some or all of the "fee" may be reflected in the difference between the bid and offer price, that is, the price the bank pays to purchase a given stock and the price the customer pays. The difference between the two is the spread, which is normally positive, since the bid price will always be lower than the offer price, so the bank, acting as a market maker, can recoup related administrative costs and make a profit. Again, the amount of competition and volume of business in the market will determine how big the spread is. When the bank acts as a stockbroker, it will charge commission for the service. Suppose a bank sells unit trusts or mutual funds. Then the price of the fund often consists of an initial charge, an annual fee, and money earned through the difference between the bid and offer price of the unit trust or mutual fund.
This discussion illustrates how complicated the pricing structure of banks' products/ services can be. Non-price features can affect the size of the interest margin or the bid-offer differential. Hence, assessing the pricing behaviour of banks is often a more complex task compared to firms in some other sectors of the economy.
1.3. Organisational Structures
The intermediary and payments functions explain why banks exist, but another question to be addressed is why a bank exhibits the organisational structure it does. Profit-maximising banks have the same objective as any other firm; so this question is best answered by drawing on traditional models. Coase (1937), in his classic analysis, argued that the firm acted as an alternative to market transactions, as a way of organising economic activity, because some procedures are more efficiently organised by "command" (e.g., assigning tasks to workers and coordinating the work) rather than depending on a market price. In these situations, it is more profitable to use a firm structure than to rely on market forces.
The existence of the "traditional" bank, which intermediates between borrower and lender, and offers a payments service to its customers, fits in well with the Coase theory. The core functions of a bank are more efficiently carried out by a command organisational structure, because loans and deposits are internal to a bank. Such a structure is also efficient if banks are participating in organised markets. These ideas were developed and extended by Alchian and Demsetz (1972), who emphasised the monitoring role of the firm and its creation of incentive structures. Williamson (1981) argued that under conditions of uncertainty, a firm could economise on the costs of outside contracts.
1.3.1. Banks and the Principal Agent Problem
The nature of banking is such that it suffers from agency problems. The principal agent theory can be applied to explain the nature of contracts between:
the shareholders of a bank (principal) and its management (agent);
the bank (principal) and its officers (agent);
the bank (principal) and its debtors (agent); and
the depositors (principal) and the bank (agent).
Incentive problems arise because the principal cannot observe and/or have perfect information about the agent's actions. For example, bank shareholders cannot oversee every management decision; nor can depositors be expected to monitor the activities of the bank. Bank management can plead bad luck when outcomes are poor.
Asymmetric information, or differences in information held by principal and agent, is the reason why banks face the problem of adverse selection because the bank, the principal, normally has less information about the probability of default on a loan than the firm or individual, the agent. Though not shown in Figure 1.1, the presence of adverse selection may mean the supply of loans curve is discontinuous at some point. Adverse selection is the reason why the supply curve is discontinuous or even backward-bending (with respect to certain borrowers), and shows that bankers are more reluctant to supply loans at very high rates because as interest rates rise, a greater proportion of riskier borrowers apply for loans. The problem of adverse incentives (higher interest rates encouraging borrowers to undertake riskier activities) is another reason why banks will reduce the size of a loan or even refuse loans to some individuals or firms.
Moral hazard is another problem if the principal, a customer, deposits money in the agent, a bank. Moral hazard arises whenever, as a result of entering into a contract, the incentives of the two parties change, such that the riskiness of the contract is altered. Depositors may not monitor bank activities closely enough for several reasons. First, a depositor's cost of monitoring the bank becomes very small, the larger and more diversified is the portfolio of loans. Though there will always be loan losses, the pooling of loans will mean that the variability of losses approaches zero. Second, deposit insurance schemes reduce depositors' incentives to monitor the bank. If a bank can be reasonably certain that a depositor either cannot or chooses not to monitor the bank's activities once the deposit is made, then the nature of the contract is altered and the bank may undertake to invest in more risky assets than it would in the presence of close monitoring.
Shareholders do have an incentive to monitor the bank's behaviour, to ensure an acceptable rate of return on the investment. Depositors may benefit from this monitoring. However, even shareholders face agency problems if managers maximise their own utility functions, causing managerial behaviour to be at odds with shareholder interest. There are many cases of bank managers boosting lending to increase bank size (measured by assets) because of the positive correlation between firm size and executive compensation. These actions are not in the interests of shareholders if growth is at the expense of profitability.
1.3.2. Relationship Banking
Relationship banking can help to minimise principal agent and adverse selection problems. Lender and borrower are said to have a relational contract if there is an understanding between both parties that it is likely to be some time before certain characteristics related to the contract can be observed. Over an extended period of time, the customer relies on the bank to supply financial services. The bank depends on long-standing borrowers to repay their loans and to purchase related financial services. A relational contract improves information flows between the parties and allows lenders to gain specific knowledge about the borrower. It also allows for flexibility of response should there be any unforeseen events. However, there is more scope for borrower opportunism in a relational contract because of the information advantage the borrower normally has.
The Jrgen Schneider/Deutsche Bank case is a good example of how relationship banking can go wrong. Mr Schneider, a property developer, was a long-standing corporate client of Deutsche Bank. Both parties profited from an excellent relationship over a long period of time. However, when the business empire began to get into trouble, Schneider was able to disguise ever-increasing large debts in his corporation because of the good record and long relationship he had with the bank. Schneider forged loan applications and other documents to dupe Deutsche and other banks into agreeing additional loans. In 1995, he fled Germany just as the bank discovered the large-scale fraud to cover up what was essentially a bankrupt corporation. After nearly 3 years in a Florida prison, Mr Schneider gave up the fight against extradition and was returned to Germany to face the biggest corporate fraud trial since the end of the Second World War. In 1998, he was convicted of fraud/forgery and given a prison term of 6 years, 9 months. The judge criticised German banks for reckless lending. Outstanding loans amounted to $137 million. Deutsche Bank apologised for improper credit assessment, especially its failure to follow proper procedures for loan verification.
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Excerpted from Modern Bankingby Shelagh Heffernan Excerpted by permission.
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