Company Performance: Revenue, profit margins, and earnings reports directly influence investor sentiment.

Industry Trends: Semiconductor industry growth, demand for IC testing services, and competitive landscape impact 6515.TW's valuation.

Economic Conditions: Global and Taiwanese economic growth, interest rates, and inflation rates affect investment decisions.

Market Sentiment: Overall stock market conditions, investor confidence, and risk appetite drive buying and selling pressure.

Geopolitical Events: International relations, trade policies, and political stability impact investor perceptions of risk.

Technological Advancements: New technologies in IC testing, automation, and data analytics influence the company's future prospects.

Financial Ratios: P/E ratio, debt-to-equity ratio, and other financial metrics impact investor assessment of the company's value.

Dividend Policy: Dividend payouts and dividend yield affect investor demand, especially for income-seeking investors.

Management Team: The competence and experience of the management team impact investor confidence in the company's strategy.

Currency Exchange Rates: Fluctuations in the NTD/USD exchange rate can affect the company's export revenue and profitability.