【Python】1.3 Lesson 1.3 Get User Input

• Input（”請輸入資料”）：跳出輸入欄位搜集輸入資料
  • 先顯示「請輸入資料」，跳出輸入欄位，等使用者輸入東西後儲存資料
    • 預設輸入的資料類型是字串（string datatype）
    • 若要搜集數字，要在用float把input包起來，把字串轉成浮點數

Practice

Assume that you work as a financial analyst and you have been tasked to develop a Python application that analyzes securities using the Capital Asset Pricing Model (CAPM).

• 1. Review the concept of CAPM and write down the formula
• 2. Write a Python code that will receive beta for a given stock, risk-free rate and expected broad market return from the user and prints out the expected return on the stock. Round your answer to two decimal points.
• 3. Perform a sanity check by comparing your answer to online CAPM calculators. This calculator could be used: https://goodcalculators.com/capm-calculator/

Hints:

• A sample code output is as shown below:
  • Please enter the name of the stock: Apple
  • Enter the risk-free rate of return in %: 4
  • Enter the stock beta: 1.25
  • Enter the expected broad market rate of return in % (Ex: S&P500): 5.6
  • Using the CAPM formula, the expected return on Apple stock = 6.0%
• You might need to change datatypes to perform math operation

stock = input("請輸入股票名稱： ")
Rf=float(input("請輸入無風險利率 Risk_free_rate in %： "))
Beta=float(input("請輸入股票貝它值 bete_of_stock in %: "))
Rm=float(input("請輸入市場報酬 braod_return_market in %： "))

expected_return_CAPM=float(Rf+Beta*(Rm-Rf))


expected_return_CAPM_2_decimal=round(expected_return_CAPM,2)

print("使用CAPM公式計算該股票{}的預期報酬為：{}％".format(stock,expected_return_CAPM_2_decimal))

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