Wiktionary

1. zaitech(Noun)

   Application of financial engineering techniques in Japanese financial markets since their deregulation in 1984.

2. zaitech(Noun)

   Speculative financial investments, using simple financial leverage as well as financial engineering, in Japanese financial markets since their deregulation in 1984.

Origin: From 財テク, from blend of 財務 and テクノロジー, the latter, from English technology. The -tech in zaitech reflects the original borrowing of English technology.