Why Different Currencies Have Different Values?

The video opens by illustrating how the U.S. dollar has different values when exchanged for Euros or Vietnamese Dong, posing the question of why currency values differ and why exchange rates constantly change. It sets the stage to discuss the factors influencing these phenomena.

Historically, currencies were tied to the 'gold standard,' where a country's money was backed by a fixed amount of gold, ensuring stability and preventing excessive money printing. However, as economies grew, countries shifted to 'fiat money' by the 1970s. Fiat money's value is government-decreed and based on public trust, rather than physical assets, making its value dependent on supply and demand.

Inflation, characterized by a currency losing its purchasing power due to an abundance of money relative to goods and services, significantly decreases a currency's value. Nobody wants to hold a rapidly depreciating currency. The video uses Zimbabwe's hyperinflation in the 1980s and 2000s as a stark example of how rampant inflation can decimate a currency's value, forcing a nation to abandon its own currency for more stable foreign ones.

Interest rates, set by central banks, are the cost of borrowing money. High interest rates attract foreign investors seeking better returns on investments, increasing demand for that country's currency and strengthening it. Conversely, lower interest rates reduce investor interest and weaken the currency. However, countries cannot simply raise interest rates indefinitely, as high rates make borrowing expensive, slowing economic growth and potentially leading to unemployment.

A country's political and economic stability is crucial for attracting foreign investment. Stable governments provide consistent rules, making businesses feel secure in investing. Significant foreign investment, as seen with China's opening to international markets, drives up demand for the local currency, strengthening it. Instability, protests, or economic problems deter investors, leading to a weaker currency.

A country's trade balance significantly impacts its currency. Countries that export more, like Japan selling cars, create demand for their currency. The 'Petrodollar' system, where oil-producing nations sell oil exclusively in U.S. dollars, forced global demand for the U.S. dollar, cementing its status as a global currency and strengthening the U.S. economy. Conversely, nations with few exports often rely on stronger foreign currencies.

Some countries opt to 'peg' their currency to a stronger, more stable currency to ensure stability and simplify trade. Brunei, for instance, pegs its currency 1:1 with the Singapore Dollar, while Belize pegs its dollar at 1:2 with the U.S. Dollar. While pegging provides stability, it also makes the pegged currency dependent on the stronger currency's economic fate, meaning problems in one can easily spread to the other.

The video discusses the concept of a single global currency, using the Eurozone as an example. While convenient for trade and travel, a unified currency requires countries to surrender monetary control to a central bank, making it difficult for individual nations to address internal economic problems without affecting others. A global currency would risk one country's economic crisis becoming a worldwide problem.

The video concludes by explaining that a universally strong currency isn't always ideal. Different countries have different needs: import-heavy nations like Singapore benefit from a strong currency (cheaper imports), while export-oriented nations like China may prefer a weaker currency (making exports more affordable globally, sometimes through 'currency devaluation').