<p>In the realm of international finance, a reserve currency refers to a foreign currency that is held by central banks and other financial institutions as a form of foreign exchange reserve. These currencies are typically held due to their stability, liquidity, and widespread acceptance in global markets.</p>

<h2>How It Works</h2>
<p>Central banks maintain reserves of foreign currencies to manage their exchange rates, ensure financial stability, and facilitate international trade. The most common reserve currencies are the U.S. Dollar (USD), Euro (EUR), Japanese Yen (JPY), and British Pound (GBP), often referred to as the "majors."</p>
<p>Here's how it works: A <a href="/NewSite/encyclopedia/central-bank/" class="ency-link">central bank</a> can intervene in the foreign exchange market by buying or selling its reserve currency. For instance, if a central bank wants to weaken its currency to boost exports, it can sell its reserve currency (e.g., USD) and buy its domestic currency. Conversely, to strengthen its currency, it can buy its reserve currency and sell its domestic currency.</p>

<h2>Why It Matters</h2>
<p>Reserve currencies play a crucial role in the global financial system due to several reasons:</p>
<ul>
  <li><strong>Liquidity and Stability:</strong> Reserve currencies are highly liquid and stable, making them ideal for international transactions and investments. They provide a safe haven during market turmoil.</li>
  <li><strong>International Trade:</strong> Many commodities, such as oil, are priced in reserve currencies. This facilitates international trade and helps manage risks associated with currency fluctuations.</li>
  <li><strong>Central Bank Operations:</strong> Reserve currencies are used by central banks to manage their exchange rates, control inflation, and maintain financial stability.</li>
</ul>