**📅 Date:** ➤ ⌈[[2025-02-09-Sun〚Interest Rate ▪ Money Neutrality ▪ Central Bank〛]]⌋ **💭 Note:** ➤ Monetary Policy Tools: 1️⃣ ==Open Market Operations (OMO)== → Buying/selling government bonds to control liquidity. 2️⃣ ==Discount Rate (Lender of Last Resort)== → The rate at which banks borrow from the central bank. 3️⃣ ==Reserve Requirement== → The minimum cash reserves banks must hold. ➤ Most central banks aim for **2% inflation stability**. ⇩ 🅻🅸🅽🅺🆂 ⇩ **🏷️ Tags**: #💰/Noun #💰/Economy-Class **🗂 Menu**: ⌈[[✢ M O C ➣ 02 ⌈F E B - 2 0 2 5⌉ ✢|2025-F E B-MOC]]⌋ ➤ ⌈[[Fisher Effect & IFE- L012]]⌋ ➤ ⌈[[Interest Rate - L012]]⌋ ➤ ⌈[[Econ 011- Money & Money Creation]]⌋ **📑 PDF**：[[Economic L012 - Money Supply, Quantity Equation Of Exchange， Fisher Effect, Central bank .pdf]] **🌐 Link**: --- ## I. What is a Central Bank? A **central bank** is the institution responsible for **monetary policy, currency stability, and financial system regulation** within a country or economic region. ### Key Functions - **Controls money supply & inflation** 🏦 - **Regulates interest rates & monetary policy** 💰 - **Ensures financial stability & manages foreign reserves** - **Acts as the lender of last resort during financial crises** 📖 **Examples:** - **U.S. Federal Reserve (The Fed)** 🇺🇸 - **European Central Bank (ECB)** 🇪🇺 - **People’s Bank of China (PBOC)** 🇨🇳 - **Bank of England (BoE)** 🇬🇧 --- ## II. Central Bank & Interest Rates 📌 **Why Do Interest Rates Matter?** - **Higher interest rates** → Reduce inflation, strengthen currency, and slow down borrowing & spending. - **Lower interest rates** → Stimulate economic growth, encourage borrowing & investment, but may increase inflation. 📌 **Monetary Policy Tools:** 1️⃣ **Open Market Operations (OMO)** → Buying/selling government bonds to control liquidity. 2️⃣ **Discount Rate (Lender of Last Resort)** → The rate at which banks borrow from the central bank. 3️⃣ **Reserve Requirement** → The minimum cash reserves banks must hold. #### The Role of Central Banks in Markets 📌 Key Focus Areas: ✅ **Monetary Policy Framework** → Expansionary (low rates) vs. Contractionary (high rates). ✅ **Yield Curve Impact** → Central bank policy influences short-term vs. long-term rates. ✅ **Inflation Targeting** → Most central banks aim for **2% inflation stability**. ✅ **Impact on Foreign Exchange (Forex)** → Interest rate changes affect currency valuation & capital flows. --- ## Money Multiplier (货币乘数) # 📌 Money Multiplier (货币乘数) ## **1️⃣ What is the Money Multiplier?** - The **Money Multiplier** measures how **initial deposits expand into a larger money supply** through the banking system. - It shows **how much money banks can create** based on central bank reserves. 📌 **Formula:** \[ \text{Money Multiplier} = \frac{1}{\text{Reserve Requirement Ratio (RRR)}} \] - **Lower RRR → Higher Money Multiplier** (More lending, more money creation). - **Higher RRR → Lower Money Multiplier** (Less lending, slower money growth). --- ## **2️⃣ How Does It Work?** 1️⃣ A person deposits **$1,000** in a bank. 2️⃣ If **RRR = 10%**, the bank **keeps $100** as reserves and **lends out $900**. 3️⃣ The borrower spends **$900**, which gets re-deposited into another bank. 4️⃣ The process repeats, creating more money in circulation. 📖 **Example Calculation (RRR = 10%)** \[ \text{Money Multiplier} = \frac{1}{0.10} = 10 \] 🔹 **$1,000 deposit can generate up to $10,000 in total money supply**. --- ## 3️⃣ Why It Matters? ✅ **Central banks adjust reserve requirements to control money supply.** ✅ **Higher Money Multiplier → More credit expansion → Stimulates economy.** ✅ **Lower Money Multiplier → Reduces excess liquidity → Controls inflation.** 📌 **In a recession, central banks lower RRR to boost lending.** 📌 **In inflationary periods, they raise RRR to limit credit expansion.** 🚀 **Final Takeaway:** The **Money Multiplier is a key concept in monetary policy**, shaping **credit availability, inflation, and overall economic growth**. 📈🏦