Interest rates play a key role in the general
business cycle and the financial markets. When interest rates change, or
interest rate expectations change, the effects are far-reaching. When
rates rise, consumers spend less which causes retail sales to slow,
which leads to reduced corporate profits, a declining stock market, and
higher unemployment.
The effect of declining corporate profits on the
stock market is compounded by the fact that higher interest rates make
interest-bearing investments more attractive, causing an exodus of money
from the stock market.
Interpretation
Historically, an increase in interest rates is
bearish for the stock market, whereas a decrease is bullish.
The following chart shows the 4-month rate-of-change
of the Prime Rate and the Dow Industrials. I drew "buy" arrows when
interest rates were falling (the indicator was below zero) and "sell"
arrows when rates were rising. The arrows show the strong correlation
between interest rates and the stock market.
Corporate Bond Rates
Just as governments issue bonds to fund their
activities, so do corporations. Corporate bonds are considered riskier
than Treasury Bonds and compensate for their higher risk with higher
yields. The yield of a specific corporate bond depends on numerous
factors, the most important is the financial health of the corporation
and prevailing interest rates. Several bond rating services provide
investors with an evaluation to help judge the bond's quality.
The Confidence Index, developed by Barron's in 1932,
uses corporate bond yields as one of its components. The Confidence
Index attempts to measure the "confidence" that investors have in the
economy by comparing high grade bond yields to speculative grade bond
yields.
If investors are optimistic about the economy, they
are more likely to invest in speculative bonds, thereby driving
speculative bond yields down, and the Confidence Index up. On the other
hand, if they are pessimistic about the economy, they are more likely to
move their money from speculative grade bonds to conservative high-grade
bonds, thereby driving high-grade bond yields down and the Confidence
Index down.
Discount Rate
The Discount Rate is the interest rate that the
Federal Reserve charges member banks for loans. Banks use the Discount
Rate as the base for loans made to their customers. The Discount Rate is
set by the Federal Reserve Board which consists of seven members
appointed by the President of the United States.
The Discount Rate does not fluctuate on a day-to-day
basis like most other interest rates. Instead, it only changes when the
Federal Reserve Board feels it is necessary to influence the economy.
During recessionary times, the Fed will ease interest rates to promote
borrowing and spending. During inflationary times, the Fed will raise
interest rates to discourage borrowing and spending, thereby slowing the
rise in prices.
Federal Funds
Banks with excess reserves can lend their reserves
to banks with deficient reserves at the Federal Funds Market. The
interest rate charged for these short (often just overnight) loans is
called the Fed Funds Rate.
Prime Rate
The Prime Rate is the interest rate U.S. banks
charge their best corporate clients. Changes in the Prime Rate are
almost always on the heels of a change in the Discount Rate.
Treasury Bond Rates
An extremely important interest rate is the yield on
30-year Treasury Bonds ("long bonds"). The U.S. Treasury Department
auctions these bonds every six months.
Long bonds are the most volatile of all government
bonds, because of the length of their maturities--a small change in
interest rates causes an amplified change in the underlying bonds'
price.
Treasury Bill Rates
Treasury Bills are short-term (13- and 26-week)
money market instruments. They are auctioned by the U.S. Treasury
Department weekly and are often used as a secure place to earn current
market rates.
Example
The following chart shows several interest rates
side-by-side.