<p>Quantitative Easing (QE) is an unconventional monetary policy tool employed by central banks to stimulate the economy when standard <a href="/NewSite/encyclopedia/interest-rate/" class="ency-link">interest rate</a> cuts are no longer effective. It involves the <a href="/NewSite/encyclopedia/central-bank/" class="ency-link">central bank</a> purchasing large quantities of assets, such as government bonds, corporate bonds, or other securities, from banks and other financial institutions. This process injects new money into the economy, increasing the money supply and lowering long-term interest rates.</p>

<h2>How It Works</h2>
<p>QE works through several channels to influence the economy:</p>
<ul>
  <li><strong>Portfolio Rebalancing:</strong> When central banks buy assets, they push up their prices, making them more attractive to investors. This encourages investors to rebalance their portfolios by selling other assets, freeing up capital for lending or investment in the real economy.</li>
  <li><strong>Lower Long-Term Interest Rates:</strong> By purchasing long-term bonds, QE increases their demand, pushing up their price and lowering their yield. This reduces long-term interest rates, making borrowing cheaper for businesses and consumers, encouraging spending and investment.</li>
  <li><strong>Exchange Rate Effects:</strong> In open economies, QE can also lead to currency depreciation. A weaker currency makes exports cheaper and imports more expensive, boosting net exports and economic growth.</li>
</ul>

<h2>Why It Matters</h2>
<p>QE matters because it provides central banks with an additional tool to manage the economy, particularly during times of economic stress. It can help to:</p>
<ul>
  <li>Stimulate aggregate demand, boosting output and employment.</li>
  <li>Lower long-term interest rates, encouraging borrowing, lending, and investment.</li>
  <li>Increase the money supply, preventing deflation and maintaining stable prices.</li>
  <li>Support government finances by lowering the cost of servicing public debt.</li>
</ul>
<p>However, QE also has its risks, including potential asset bubbles, increased inequality, and the possibility of higher inflation in the future. Therefore, central banks must carefully calibrate their QE policies to balance these trade-offs.</p>