Company Performance: The financial health of the company behind the stock, including revenue, profit margins, and debt levels, significantly impacts investor confidence.

Industry Trends: The overall performance and outlook of the industry to which the company belongs influences investor sentiment and valuation.

Market Sentiment: General investor optimism or pessimism, often driven by macroeconomic factors or global events, affects all stocks, including 603305.SHG.

Economic Conditions: Interest rates, inflation, and GDP growth can influence corporate earnings and investor risk appetite, affecting stock prices.

Government Policies: Regulatory changes, tax policies, and trade agreements can impact the company's operations and profitability.

Competitive Landscape: The intensity of competition within the industry and the company's market share influence its pricing power and profitability.

Global Events: Major global events, such as geopolitical crises or economic downturns, can trigger volatility and impact stock prices across markets.

Supply and Demand: The basic economic principle of supply and demand directly affects the stock price; higher demand pushes prices up, and increased supply pushes prices down.

Investor Expectations: Future expectations about the company's growth potential and earnings influence current stock valuations.