
Interest Rate is a macroeconomics jargon that I’ve recently came to learn about and I was intrigued at the power that it has to influence economic activity across the globe.
For consumers, interest rate is defined as the rate of returns for making savings available in the loanable funds market that is essential for financing investments and purchasing of bonds and securities. For speculators and investors, interest rate is essentially the explicit cost of borrowing.
Interest rates can be determined in the loanable funds market by natural forces of demand and supply, where in this case interest rates refer to the equilibrium value and price at which loanable funds are loaned and borrowed.
Interest rates also act as a monetary tool to adjust the demand side of the equation should the economy be either overheating or stagnating. For large and dominant economies such as the United States, the Federal Reserve, US’s Central Bank, is able to adjust interest rates in favour of achieving marcoeconomic goals. Conventional economic theory states that lowering interest rates will lower the opportunity cost of borrowing for consumers since the rate of returns from savings have decreased. On the other hand, with rate of returns from investments holding an inverse relationship with interest rates holding marginal efficiency of investments constant, investors and speculators will see an increase in profitability of investments. Both of which will boost aggregate demand and accelerate the country’s real national output growth. Interest rates seem to be a suitable tool for stimulating demand and hence growth in the economy. The converse holds true as well, where the Central Banks use interest rates as an inflation fighter and to cool down the overheating economy.
Yet, policy makers would find that as much as monetary policies is able to bring an economy out of a recession in theory, orthodoxy monetary policies hardly work during recessions because the situation is not as rosy as it seems to be. John Maynard Keynes proposed that the level of investments is rather interest-inelastic and is mainly affected by factors such as level of confidence in the economy and based on instincts of investors. Also, a more pertinent issue here is that in the aftermath of a financial crisis, banks are often unwilling to lend as they require more credit worthiness than usual in consumers and investors. Consumers, on the other hand, are more concerned with reducing their liabilities by increasing savings and it is unlikely that they will borrow in the short run.
With interest rates near zero, Central banks run into risks of falling into a liquidity trap, a phenomenon where adjusting interest rates will no longer affect consumption and investments and when monetary policy fails totally.
Other than the domestic economy, interest rates will also exert an effect on the external economy of the country. With the rise of interest rates, the financial account will see a net financial inflow of funds and capitals as investors and speculators deposit their assets here in order to make short term profits on interest rate differences (See also: Hot Money). In the Foreign Exchange Market, this will essentially boost demand for domestic currency. Assuming that the supply of domestic currency in the Forex market remains constant, the surplus of demand over supply of domestic currency will result in an appreciation of the currency, causing the currency to grow stronger relative to global currencies. The implications of rising interest rates is thus a stronger currency that will enable the country to consume more imported goods and off-setting any cost-push inflation at the cost of its competitiveness in the external sector. The converse holds true as well.
I believe it has been aptly illustrated that interest rates, though simple in function, plays a pivotal role in many economic activities in the Market. It is unbelievable how a simple tool can cause a chain of after-effects that either stabilizes or destabilizes the economy. For Singapore being an open economy that is reliant on international trade flows, she is an interest rate taker. But with that said it doesn’t mean that Singapore is disadvantaged, not least the outcome of using monetary interest rate to combat symptoms of economic ailments is an uncertain one.






