While the direct impact of Apple's iPhone sales growth in mainland China on the iShares China Large-Cap ETF (FXI) may be limited, it contributes to a positive narrative around Chinese consumer market strength and tech sector growth. This could indirectly benefit FXI by enhancing investor sentiment towards companies and sectors within the ETF's portfolio that benefit from robust consumer spending in China.

The growth of iPhone sales in mainland China is a significant development for Apple, as China represents a large and competitive market. This growth is likely to positively impact investor sentiment and Apple's stock price in the short term, reflecting confidence in the company's ability to expand its market share and generate revenue in key regions.