When I bought it, it was 1.2 yuan, and now it is 1.0 yuan. Could be:

If you buy it with the accumulated net value of 1.2 yuan, you will get a dividend of 1.5 yuan in the middle. You made more than double.

If you bought it with a cumulative net worth of 2.7 yuan, then you lost 0.2 yuan.

Cumulative net value = current net value+cumulative dividend