1. 1 Money and Interest Rates MBA 774 Macroeconomics Class Notes – Part 2

2. 2 What is Money? Medium of exchange –Allows transactions not based on barter –Avoids the need for a “double coincidence of wants” Unit of account –Common measure of value for goods, services, and contracts Store of value –Allows for transfer of wealth through time –Most liquid of all assets

3. 3 Types of Money Pure Commodity –Scarce commodity is agreed on as “money” –For example: gold, silver, cattle, cigarettes Commodity Standard –Certificates representing claims on a commodity are issued and used instead of the commodity itself –For example: the US was once on a “gold standard” Fiat Money –Money established by government decree –Fiat money has no intrinsic value

4. 4 US Measures of Money Currency = Bills and coins outside U.S. Treasury, Federal Reserve Banks and the vaults of depository institutions M1 = Currency plus travelers’ checks, demand deposits, other checkable deposits M2 = M1 plus savings deposits, small-denomination time deposits, retail money market mutual funds, and overnight repurchase agreements M3 = M2 plus large-denomination time deposits, institutional money funds, and Eurodollars (discontinued in 2005) L = M3 plus other liquid securities such as savings bonds and short-term Treasury securities

5. 5 US Money Supply Statistics

6. 6 The US Federal Reserve Federal Reserve System is the US “central bank” –Foreign counterparts include the European Central Bank (ECB), The Bank of England, and the Bank of Japan Founded in 1913 by congress, “to provide the nation with a safer, more flexible, and more stable monetary and financial system.” Primary functions are –Monetary policy –Banking supervision and regulation –Providing certain services (e.g., check clearing)

7. 7 The US Federal Reserve (2) The “System” is composed of 12 regional banks and a Board of Governors in Washington, DC –Governors, the Chairman and Vice-Chairman are appointed by the President and confirmed by the Senate Monetary policy is overseen by the “Federal Open Market Committee” or FOMC which includes –Board of Governors –Fed Bank of NY President –4 other regional bank presidents on a rotating basis

8. 8 Monetary Policy (1) About every six weeks the FOMC meets to determine monetary policy for the US In practice, this means determining the target for the “Federal Funds Rate” –an inter-bank overnight interest rate Fed decreases (increases) the Fed Funds rate by buying (selling) government securities which increases (decreases) the available money supply –The Federal Reserve Bank of NY makes these purchases or sales on the open market--hence the name Federal Open Market Committee.

9. 9 Monetary Policy (2)

10. 10 The Fed’s Actions around 9/11

11. 11 Monetary Policy (3) The official objectives of US monetary policy are, “economic growth in line with the economy's potential to expand, a high level of employment, stable prices (that is, stability in the purchasing power of the dollar), and moderate long-term interest rates.” Conceptually, the Fed will raise (the real) interest rate if GDP is greater than “Potential GDP” and vice-versa

12. 12 Aside: Real vs. Nominal Rates It is often said that the interest rate is the “cost of money.” Is this true? Ultimately, we use money to obtain consumption goods Think of the interest rate in terms of trading some real amount of consumption in one time period for some real amount of consumption in another time period –Note however, borrowing and lending contracts are stated in nominal terms.

13. 13 Aside: Real vs. Nominal Rates The real rate of interest (R*) can be defined as approximately, Real Interest Rate = Nominal Interest Rate - Anticipated Inflation In 2004, what was R* in the –the US? –Japan?

14. 14 Monetary Policy (4) Potential GDP is the rate of economic activity that leads to stable prices and employment Intuitively it is the amount of output that is generated by utilizing all available resources at there highest sustainable level. Algebraically, we can think of it as PotGDP = (aggregate hours available for work) x (average output per hour)

15. 15 Monetary Policy (5) Economists often discuss the Potential GDP Growth Rate which is approximately PotGDP Growth = Labor Force Growth Rate + Productivity Growth Rate We can calculate PotGDP Growth with this formula for the last 50 years

16. 16 Historical Potential GDP

17. 17 Better Estimates of PotGDP

18. 18 Monetary Policy and the GDP Gap Monetary Policy Regime Change Note: GDP Gap = (Actual GDP - PotGDP) / PotGDP

19. 19 NAIRU Another way of thinking about potential output is the equilibrium rate of unemployment or NAIRU (Non-accelerating Inflation Rate of Unemployment) NAIRU is the rate of unemployment below which there will be inflationary pressures The exact level of NAIRU is an issue of debate. –Most economists believe it is somewhere between 4% and 6% in the US and Japan. Probably higher in Europe (7-8%).

20. 20 Monetary Policy and NAIRU Monetary Policy Regime Change Note: U-NAIRU is actual unemployment minus NAIRU and is sometimes called the employment gap.

21. 21 Other Mechanisms for Monetary Policy The Fed also has two other ways of controlling monetary policy –The discount rate –Reserve requirements Reserve requirements (rr) directly affect the level of money via the “money multiplier” (1/rr) –Example, if the reserve requirement is 20% of deposits then the money multiplier is 1/0.2 = 5

22. 22 Fractional Reserve Banking The Fed buys a $1,000 (market value) treasury bond from a bond dealer The dealer deposits the $1,000 proceeds into its bank, FirstBank –Money supply increases by $1,000 FirstBank only has to keep $200 as reserves and loans the $800 balance: FirstBanks Balance Sheet AssetsLiabilities Reserves$200Deposits$1,000 Loans$800

23. 23 Fractional Reserve Banking (2) Assume FirstBank made an $800 computer loan to a student. Money supply increases to $1,800 The student buys a computer at BestBuy which deposits the $800 at its bank, SecondBank SecondBank also loans out all but 20% SecondBank Balance Sheet AssetsLiabilities Reserves$160Deposits$800 Loans$640 Now money supply = 1,000 + 800 + 640 = 2,440

24. 24 Fractional Reserve Banking (3) This practice of keeping 20% reserves and loaning out the rest continues indefinitely However, the ultimate increase in the money supply (  M S ) is finite and equal to  M S =  D / rr  M S = $1,000 / 0.2  M S = $5,000 where  D is the original increase in money by the Fed [ Mathgeeks note, its a converging geometric sequence: 1+x+x 2 +x 3 +... = 1/(1-x) where x = (1-rr) ]

25. 25 Fed Reserve Requirements Requirement Type of Deposit % of Deposits Effective Date Net transaction accounts $0 million-$8.5 million 012/21/06 $8.5 million-$45.8 million 312/21/06 More than $45.8 million 1012/21/06 Nonpersonal time deposits 012/27/90 Eurocurrency liabilities 012/27/90 Required reserves must be held in the form of deposits with Federal Reserve Banks or vault cash. Nonmember institutions may maintain reserve balances with a Federal Reserve Bank indirectly, on a pass-through basis, with certain approved institutions. Under the Monetary Control Act of 1980, depository institutions include commercial banks, savings banks, savings and loan associations, credit unions, agencies and branches of foreign banks, and Edge Act corporations. See also: http://www.federalreserve.gov/monetarypolicy/0693lead.pdf

26. 26 Interest Rates There are lots of important USD interest ratesimportant USD interest rates –Federal funds rate –Discount rate –Prime rate –Commercial paper rate –LIBOR and Eurodollar (similar for other currencies) –T-bill, T-note, T-bond rate –Swap rates –Corporate bond rates –Overnight repurchase rate or “Repo” rate Rates depend on credit risk, liquidity, and maturity

27. 27 Government Issues Thru 6/07

28. 28 Corporate Bonds Thru 6/07

29. 29 A Model of the Money Market More detail about what affects interest rates For now consider “money” to be M1 Also we assume that the money supply is controlled by the central bank (e.g., the US Federal Reserve) Specifically, the central bank fixes the amount of money in the aggregate economy (M S ) at a level it desires regardless of other factors

30. 30 Individual Money Demand Individuals’ demand for money is based on –The expected (real) return on money: Money (M1) pays little or no interest => higher interest rates will lead to less demand for money –The riskiness of the return The risk of holding money comes from variation in the price level. Why? –Liquidity The primary value associated with money is derived from liquidity Since a primary use of money is as a medium of exchange, this implies an increase in the value of individual transactions increases the demand for money

31. 31 Aggregate Money Demand Aggregate money demand is the sum of demand for money by all households and firms in the economy In aggregate we can say the determinants of the aggregate demand for money are –The interest rate –The price level (think CPI) –Real national income (or GNP or GDP) Because this determines the need for liquidity

32. 32 Aggregate Money Demand Define aggregate money demand as M D = P * L(R,Y) or M D / P = L(R,Y) where, M D = Aggregate money demand P = Price level R = Interest rate Y = Real national income (or GNP or GDP) and, L decreases as R increases L increases as Y increases

33. 33 Aggregate Money Demand L(R,Y) Interest Rate (R) Aggregate Real Money (M/P) L(R,Y 1 ) Interest Rate (R) L(R,Y 2 ) Increase in Y Aggregate Real Money (M/P)

34. 34 Equilibrium in the Money Market In equilibrium, M S = M D = P*L(R,Y) Aggregate Real Money Demand L(R,Y) Interest Rate (R) Real Money Supply R1R1 M S /P 2 3 1 R2R2 R3R3 Q2Q2 Q3Q3 Aggregate Real Money (M/P)

35. 35 Increase in Money Supply Suppose the money supply increases from M 1 /P to M 2 /P Aggregate Real Money Demand L(R,Y) Interest Rate (R) Real Money Supply Increases R1R1 M 1 /P 2 1 R2R2 M 2 /P Aggregate Real Money (M/P)

36. 36 Increase in GDP Suppose real income (GDP) increases from Y 1 to Y 2 L(R,Y 2 ) Interest Rate (R) Real Money Supply R1R1 M S /P 2 1’ 1 R2R2 Q 1’ L(R,Y 1 ) Aggregate Real Money (M/P)