确实。The fund不够透明，make it more risky. Also

"low tax efficiency (because of taxable capital gains distributions resulting from portfolio turnover) and high (1.8 percent) annual expenses"

See the following two links:

Behind the Oceanstone Fund’s long run as a Lipper Leader

http://www.fundmojo.com/mutualfund/fund_report/mutualfund/OSFDX

But the fund seems pretty stable. I am really amazed about this guy's experience.