analysis of company financial data and operating
conditions to construct factors (Chincarini & Kim,
2006). Commonly used fundamental factors include
price-to-earnings ratio (PE), price-to-book ratio (PB),
dividend yield, revenue growth rate, and net profit
growth rate. These factors reflect a company's
profitability, growth potential, and valuation level,
and are suitable for long-term investment strategies.
For example, stocks with low price-to-earnings ratios
and high dividend yields are usually considered value
stocks with high investment value. However, the
limitation of fundamental analysis is its strong
reliance on financial data, which may be lagging and
easily affected by accounting policies. Additionally,
fundamental analysis usually assumes that the market
can effectively reflect a company's intrinsic value, but
in actual markets, this assumption may not hold.
3.1.2 Technical Analysis
Technical analysis is a method of predicting future
price trends by analyzing historical price and trading
volume data. Commonly used technical indicators
include moving averages (MA), relative strength
index (RSI), Bollinger Bands, and MACD (moving
average convergence divergence). These indicators
capture price trends, market sentiment, and
overbought or oversold conditions to construct
factors. For example, moving averages can be used to
identify trends, while the relative strength index can
be used to judge overbought or oversold conditions in
the market. The advantage of technical analysis is that
it is suitable for short-term trading strategies and
responds quickly to market changes. However, the
limitation of technical analysis is its strong reliance
on historical data and its susceptibility to market
noise. Additionally, technical analysis usually
assumes that historical price patterns will repeat, but
in actual markets, this assumption may not hold.
3.1.3 Statistical Analysis
Statistical analysis is a method of extracting factors
from data through mathematical and statistical
methods. Commonly used statistical methods include
principal component analysis (PCA), factor analysis,
and regression analysis. Principal component analysis
extracts the main features of data through
dimensionality reduction, factor analysis extracts
latent variables to explain the correlation between
observed variables, and regression analysis constructs
factors by establishing the relationship between
dependent and independent variables. For example,
regression analysis can be used to construct multi-
factor models, such as the Fama-French three-factor
model and the Carhart four-factor model (Fama &
French, 1993). The advantage of statistical analysis is
that it can handle high-dimensional data and extract
latent patterns. However, the limitation of statistical
analysis is its strong assumption about data
distribution and its susceptibility to multicollinearity
and overfitting. Additionally, statistical analysis
methods usually assume linear relationships between
variables, making it difficult to capture complex
nonlinear relationships.
3.1.4 Macroeconomic Analysis
Macroeconomic analysis is a method of constructing
factors by analyzing macroeconomic indicators.
Commonly used macroeconomic factors include
interest rates, inflation rates, GDP growth rates, and
unemployment rates. These factors reflect the impact
of the macroeconomic environment on asset prices
and are suitable for asset allocation and long-term
investment strategies. For example, a low-interest-
rate environment is usually favorable for the stock
market, while high inflation rates may lead to rising
bond yields. The advantage of macroeconomic
analysis is that it can capture the systemic impact of
the macroeconomic environment on the market.
However, the limitation of macroeconomic analysis
is its high requirement for data timeliness, and
changes in macroeconomic indicators are usually
slow, making it difficult to use for short-term trading
strategies. Additionally, macroeconomic analysis
usually assumes a stable relationship between
macroeconomic indicators and asset prices, but in
actual markets, this assumption may not hold.
3.1.5 Advantages and Disadvantages of
Traditional Methods
Traditional methods have the following advantages in
factor mining. First, traditional methods are usually
based on economic and financial theories, with clear
logic and easy understanding and interpretation.
Second, the computational complexity of traditional
methods is low, making them suitable for large-scale
data processing. Finally, many traditional factors
have shown stable performance in long-term
backtesting, with high reliability. However,
traditional methods also have the following
limitations: First, traditional methods have high
requirements for data completeness and accuracy, and
data quality issues may affect the effectiveness of
factor mining. Second, traditional methods usually
assume linear relationships between variables,
making it difficult to capture complex nonlinear
relationships. Finally, traditional methods may fail in