Research On Graham’s Individual Investor’s Defensive Portfolio Strategy Based On Python

In recent years,China’s economy has continued to develop at a high speed,but the Chinese stock market has been volatile and there are no rules to follow.This has made investors speculate in the stock market.The final result can be described as heavy losses.This makes the current Chinese securities market unprecedented.Believe in and pursue value investment,among which Graham’s classic value investment philosophy-defensive portfolio strategy is highly sought after.This article uses Python language to give a complete and systematic explanation of Graham’s individual investor defensive portfolio strategy,and at the same time carry out a Chinese transformation,in order to verify its effectiveness in the Chinese securities market,and finally adopt defensive investment behavior for individual investors conduct guidance and reference.This research is mainly divided into the following parts: Firstly,the research background and significance of this research,domestic and foreign research status,research ideas and methods,and possible innovations are explained;secondly,the theoretical and technical foundations are sorted out and analyzed.The development and evolution of portfolio theory clarifies the logic of technology operation and lays a theoretical and technical foundation for the feasibility of the strategy.Then design and compile the defensive investment portfolio strategy of Graham individual investors,clarify the investment philosophy of the strategy,stipulate the execution rules of the strategy,and define the criteria for the effectiveness of the strategy,and finally complete the compilation of the strategy on the Join Quant quantitative platform.The fourth part is based on the stock portfolio selected in the third part,and then adds low-risk assets,adjusts the allocation ratio of funds between stocks and low-risk assets,starts with static analysis and dynamic analysis,and makes basic strategies A and D And optimization strategy B,C1,C2,C3,E,F1,F2,F3,the final comparative analysis shows that the optimal strategy is C3,that is,the allocation of funds between stocks and low-risk asset portfolios under the condition that positions are adjusted once a year The conclusion that the strategy is optimal when the ratio is 8:2 is because the market fluctuates greatly during the backtest period,and the stock portfolio selected by the strategy is defensive,and dynamic timing will result in frequent loss of gains in repositioning.The fifth part puts forward the conclusion that Graham’s individual investor defensive portfolio strategy is effective in the Chinese securities market,and the optimal strategy is strategy C3.At the same time,it proposes that the safety margin should be used throughout investment activities to clarify its own positioning.Reasonably screen stocks,and finally look forward to the expansion direction of the research can be to join the fixed investment strategy,switch to an aggressive investment concept,and promote to other Graham classic value investment methods.