Underlying Index Performance: 510990.SHG tracks the SSE Dividend Index. Its price closely mirrors the aggregate performance of the constituent stocks' dividends and capital appreciation.

Supply and Demand: Market forces dictate ETF prices. High demand pushes prices up, while increased selling pressure leads to price declines.

Net Asset Value (NAV): NAV represents the collective market value of the ETF's holdings. Discrepancies between the ETF price and NAV can create arbitrage opportunities, influencing price.

Trading Volume and Liquidity: High trading volume typically translates to tighter bid-ask spreads and efficient price discovery. Lower liquidity might increase price volatility.

Market Sentiment: Overall investor confidence or pessimism towards the Chinese stock market or dividend-focused stocks can impact demand for 510990.SHG.

Expense Ratio: While not directly affecting daily price fluctuations, a higher expense ratio reduces long-term returns, potentially making the ETF less attractive to investors.

Dividend Yield and Payouts: The ETF's dividend yield and the timing of dividend distributions influence investor interest and potentially, the ETF's price.

Economic Conditions: Macroeconomic factors like interest rates, inflation, and GDP growth in China can affect the profitability of companies within the SSE Dividend Index, thereby affecting the ETF price.

Regulatory Changes: Changes in regulations pertaining to dividends, stock markets, or ETFs in China may influence the perceived risk and attractiveness of 510990.SHG.