常規交易
arm's length transaction
一般而言，這是最簡單的一種交易。“普通工具（Plain vanilla）”是指最基本或最典型的一種金融工具，多數為期權、債券及期貨。與普通工具相對的是特種工具。特種工具是一種透過更改傳統金融工具的組合成分而演變出來的證券，複雜程度因此較高。
Generally, this is the easiest kind of deal. "General Tools (Plain vanilla)" refers to the most basic or most typical kind of financial instruments, the majority of options, bonds and futures. And is relatively common tools special tools. Is a special tool to change the traditional financial instruments through a combination of ingredients has evolved out of stock, so a higher degree of complexity.