Therefore your "ratio" is incorrect because "信息科技指數基金，約占50%" PLUS 28% of the "標普500指數基金，約占50%".
https://www.investopedia.com/articles/investing/122215/spy-spdr-sp-500-trust-etf.asp
SPY ETF Top Holdings
The SPY is a well-diversified basket of assets, which allocates its holdings across multiple sectors. The top five listed below are as of June 1, 2023:
- Information Technology: 28.23%
- Healthcare: 13.30%
- Financials: 12.46%
- Consumer Discretionary: 10.70%
- Communication Services: 8.49%
| SPY ETF’s Top 10 Holdings (as of July 6, 2023) | |
|---|---|
| Holding (Company) | % SPY Portfolio Weight |
| Apple (AAPL) | 7.70% |
| Microsoft (MSFT) | 6.89% |
| Amazon (AMZN) | 3.11% |
| NVIDIA (NVDA) | 2.83% |
| Tesla (TSLA) | 2.02% |
| Alphabet—Class A (GOOGL) | 1.94% |
| Meta Platforms—Class A (META) | 1.75% |
| Alphabet—Class C (GOOG) | 1.68% |
| Berkshire Hathaway—Class B (BRK.B) | 1.65 |
| UnitedHealth (UNH) | 1.19% |
You can calculate the TRUE allocations of the 100% between these 2 categories. Definitely is not your 50/50 split. 
