Business turnover for transactions of foreign exchange, negotiable securities or futures conducted by non-financial organizations or individuals is free from business tax.

非金融机构和个人买卖外汇、有价证券或期货，不征收营业税。

youdao

The appointment of Mr. Thompson is unlikely to interfere with Yahoo's discussions about the tax-free exchange of its stakes in Alibaba and Yahoo Japan for cash and other assets, some of the people familiar with the matter said.

WSJ: Yahoo Taps Scott Thompson as CEO

Small family companies will explore these new opportunities to be rewarded tax-free, in exchange for surrendering rights they never use.

BBC: Plugging the leaks in the tax system

The idea is to allow holders of IRAs to pay tax on their accounts in exchange for converting them into Roth IRAs, which then become tax-free forever.

FORBES: Stupid Tax Tricks and the Debt Ceiling