Company Performance: SPI.BK's profitability, revenue growth, and debt levels directly impact investor confidence and stock price.

Overall Market Conditions: Broad economic trends, interest rates, and investor sentiment in the Thai stock market influence SPI.BK's valuation.

Industry Trends: Performance of the specific sector SPI.BK operates in, including regulatory changes and technological advancements, affects its stock price.

Investor Sentiment: Positive or negative news and opinions about SPI.BK or its industry can drive buying or selling pressure, impacting the stock price.

Dividend Payments: SPI.BK's dividend policy and yield influence investor demand, particularly from income-seeking investors.

News & Events: Major announcements, like earnings reports, mergers, or new product launches, can significantly alter the stock price.

Currency Fluctuations: Changes in the Thai Baht's exchange rate can impact SPI.BK's earnings, especially if it has significant international operations.

Global Economic Factors: Global economic growth, trade policies, and geopolitical events can indirectly affect SPI.BK's performance and stock price.

Competitive Landscape: The actions of SPI.BK's competitors, including pricing strategies and market share gains, can impact its profitability and stock price.

Regulatory Environment: Changes in government regulations and policies can affect SPI.BK's operating costs and profitability.

Analyst Ratings: Recommendations from financial analysts can influence investor decisions and affect the stock price.

Supply and Demand: The fundamental economic principle of supply and demand is always at play, influencing the price of the stock.