Central bank monetary policy and why it matters to traders

Central bank is a sovereign national bank that provides financing and banking services for the sovereign government's banking system. The Central banks operate independently of the government and uses its power to influence monetary policy. It is often referred to as a 'lender of last resort' and acts as a bank for the nation's commercial banks.
The primary goal of Central banks is to maintain price stability by controlling inflation. Some central banks (such as the US Federal Reserve) also have a dual mandate of achieving maximum employment. You might wonder how a financial institution can play a role in creating jobs in the economy. You will find the answer to this later in the article. The Central bank is also the only legal financial institution that is allowed to print money as a legal tender.

How do Central banks control inflation, create jobs and thus influence the economy?
The Central banks operate within two main areas of interest, which are as follows:

Macroeconomic policies: These policies are usually limited to regulating inflation and maintain price stability by changing the benchmark interest rates.

Microeconomic policies: The microeconomic policies are limited to the scope of acting as a 'lender of last resort' for commercial and private banks. In this role, the Central bank also sets out financial regulations governing the nation's financial institutions.

In order to maintain price stability and thus control inflation, Central banks operate through the 'Open market transactions' which is used as a 'gas pedal' to increase the flow of money supply by means of either printing more money or cutting interest rates to encourage lending in an environment of slowing growth while at the same time, the Central bank can ease off the 'gas pedal' and hike interest rates and reduce the amount of money in circulation to slow down an overheating economy.

The Central bank thus achieves its mandate of price stability by keeping a close eye on inflation. Most Central banks usually set a target inflation rate which forms the benchmark for policy shifts. For example the Bank of England has aninflation target of 2%, where as the Reserve Bank of Australia has an inflation target of 2 - 3%. As you can see, it varies from one central bank to another.

More recently, after the global financial crisis, Central Bank policies across various economies took on unconventional means of stimulating the economy and thus control inflation by means of Quantitative easing, which simply put involves buying sovereign bonds and thus injecting money or increasing the money supply in the markets. Jobs are created when there is more money available and cheaper credit that allows businesses to borrow more in order to kick start or expand their businesses, which in turn involves an increased pace of hiring and thus jobs. The more jobs that are created, the more people are employed, which in turn results in an increased pace of purchases in the economy. As you can see, it is a closed cycle.
 

From a trader’s perspective, Central bank policies play a role in terms of shaping money flows into a currency, it also influences the bond markets as well as some of the well talked about trading strategies such as ‘Carry trade strategy’ which is primarily designed around Central bank interest rate and monetary policies.

As a simple example, when a Central Bank ‘A’ has lower interest rates and pledges to keep interest rates low for a prolonged period of time, traders tend to look for currencies (economies) where the other Central Bank ‘B’ has higher interest rates. In such a scenario, traders can either park their money in the currency of the Central Bank ‘B’ to get higher returns via interest or they can borrow currency from Central Bank ‘A’ (which anyway offers lower interest rate) which is then used to fund investments in the other currency.

A real life example is the Yen. The Bank of Japan, the Japanese Central bank, in a bid to boost inflation has embarked on a massive Quantitative easing policy, which besides printing money also includes maintaining low interest rates. Therefore, the Yen has become a preferred currency for carry trade strategists, who borrow money in Yen (paying lower interest rates) and use it to fund a foreign currency where the prevailing interest rates are higher. The carry trade strategy can also be used to fund foreign or domestic equities as well.

Besides the above example, fundamentally, a country or economy whose Central bank levies higher interest rates is often more stronger or carries a higher exchange rate than compared to a country or economy whose Central bank charges a lower interest rate. Higher interest rates also signify that general health of the economy.

To conclude, while Central bank monetary policies may seem complicated to some, they are indeed one of the very basic and simplest to understand in terms of gauging what the Central bank thinks about the economy and how it uses its interpretation of the economic indicators to influence monetary policy in the future by managing interest rates, which in turn tends to play role in controlling inflation, creating jobs and thus overall influence the economy it is operating for.