Were that true, some Wall Streeters reckon, it would breach all sorts of informal investment-banking codes.

华尔街的一些金融家认为，如果情况属实，那么这就违反了所有无明文规定的投行准则。

youdao

Meanwhile, remittances from abroad, self-employment, tourism, foreign investment and the informal economy have lifted the incomes of a large group of Cubans.

同时，海外侨汇、自营商、观光业、外国投资和非正式经济已经提高了大群古巴人的收入。

youdao

Poker has long had an informal investment economy where players stake others or are staked by wealthy friends.

WSJ: $1 Million Ante Lures Poker Investors

Meanwhile, remittances from abroad, self-employment, tourism, foreign investment and the informal economy have lifted the incomes of a large group of Cubans.

ECONOMIST: Cuba's economy

They rely on retained earnings and foreign direct investment, or else on informal sources of credit.

ECONOMIST: Casino capital