This statement is correct, but doesn't address the problem with the OP's calculation.
This fund is up basically entirely on the strength of TSLA being up 700%. OP is basically considering two possibilities:
1. TSLA stock is a driftless geometric Brownian motion with a volatility matching that of the general market, and happened to get a 700% return purely by chance, or
2. The fund manager, due to his exceptional skill, knew that TSLA was going to be up 700%.
The OP is rejecting option (1) and then concluding that option (2) must be the case.
Of course in reality neither is the case and the OP's calculation is totally irrelevant.
This fund is up basically entirely on the strength of TSLA being up 700%. OP is basically considering two possibilities:
1. TSLA stock is a driftless geometric Brownian motion with a volatility matching that of the general market, and happened to get a 700% return purely by chance, or
2. The fund manager, due to his exceptional skill, knew that TSLA was going to be up 700%.
The OP is rejecting option (1) and then concluding that option (2) must be the case.
Of course in reality neither is the case and the OP's calculation is totally irrelevant.