When the share multiplied by the net value is greater than 500, it is profitable. If you want to count the subscription fee and redemption fee, it will be more than 505. (I don't know your subscription rate)

Your next question is not easy to answer. Because this fund is not invested in this way.

Index funds invest in the stock market. As you can see, it is related to S&P 500ETF, which is an index fund.

The rise and fall of this fund is completely influenced by the stock market.

It's hard to make money in the short term. Don't think you can judge the stock market. Besides, it is still a US stock market.

The correct investment method of such funds is fixed investment and long-term purchase in batches.

Doing short-term work is easy to get stuck, and the handling fee is extremely high.