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題名:機器學習於投資組合之表現—隨機森林法的應用
作者:簡清源
作者(外文):CHIEN, CHING-YUAN
校院名稱:元智大學
系所名稱:管理學院博士班
指導教授:羅懷均
學位類別:博士
出版日期:2022
主題關鍵詞:交易策略機器學習隨機森林蒙地卡羅模擬凱利公式Trading StrategyMachine LearningRandom forestMonte CarloKelly formula
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近年來投資人逐漸應用人工智慧來輔助進行投資決策。因此,本文主要研究以人工智慧的機器學習法,應用於台灣股票市場的交易。本文運用個股過去的股票報酬率、交易週轉率與月營收年增率,應用隨機森林演算法預測未來可能上漲的股票作為投資標的,再搭配蒙地卡羅模擬法與凱利公式來建構投資組合。
實證研究發現,使用隨機森林演算法,可建構的年平均報酬率略高於市場投資組合的報酬率,且有較低的風險,因此有較佳的Sharpe index。特別是加入月營收年增率後的投資策略,更能大幅降低投資組合的標準差,因此能獲得顯著正的超額報酬。本研究實證顯示,機器學習對於投資策略與投資組合建構具有正面的幫助,特別在提高投資組合的報酬表現及降低投資組合的風險。這項研究能幫助投資人瞭解如何利用機器學習建構可獲利的投資策略與投資組合。
In recent years, investors have gradually applied artificial intelligence to assist investment decisions. Therefore, this research mainly application the machine learning method of artificial intelligence to the trading of the Taiwan stock market. This paper uses the past stock return rate, transaction turnover rate and revenue growth rate of individual stocks, and uses random forest algorithm to predict future stocks that may rise as investment targets, and then uses Monte Carlo simulation method and Kelly formula to construct investment portfolios.
Empirical studies have found that, using the random forest algorithm, the annual average return rate that can be constructed is slightly higher than the return rate of the market portfolio, and it has lower risk and thus a better Sharpe index. In particular, the investment strategy after adding the annual growth rate of monthly revenue can greatly reduce the standard deviation of the investment portfolio, and thus can obtain a significant positive excess return.This study confirmed shows that machine learning has positive benefits for investment strategy and portfolio construction, especially in reducing portfolio risk. This study can help investors understand how machine learning can be used to construct profitable investment strategies and portfolios.
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