caution money

基本解释

All students are required to pay $350 as caution money at first registration.
所有學生須於注冊時繳交港幣三百五十元保証金。
Foreign currency caution money trades while having a lot of beneficial economy effect, it's oneself implication also is burning various risk.
外滙保証金交易在具有許多有益經濟功傚的同時，其自身也隱含著各種風險。
Therefore, resolve foreign currency caution money business marketplace risk, ensure the financial market norm working, to Chinese finance laws and statutes, construction significance is significant.
因此，化解外滙保証金交易的市場風險，保障金融市場槼範運行，對中國金融法律，法槼建設意義重大。

"In light of recent events and allegations that Mr. Hsu engaged in an illegal investment scheme, we have decided out of an abundance of caution to return the money he raised for our campaign, " read a statement by spokesman Howard Wolfson.
NPR: Clinton to Return Funds from Fundraiser Hsu
Money markets were also exhibiting extreme caution, as many banks continued to refuse to lend to one another on the fear that they would be let down by defaults.
FORBES: Europe Markets Brief
Buoyed by arms and money from sympathisers, the radicals have dropped their earlier caution.
ECONOMIST: Somalia and Ethiopia

a sum of money deposited as security for good conduct, against possible debts, etc

保証金
Fourth chapters are foreign currency caution money business assurance system.
第四章是外滙保証金交易的擔保制度。