We regret that, owing to a shortage of stock, we are unable to fill your order.

因为存货短缺，未能供应贵公司所需货品，特此致歉。

youdao

Owing to a shortage of stock, we regret that we are unable to accept your repeat order. (

由于库存短缺，很抱歉我方不能考虑接受贵方续订单。

youdao

The shortage of good stock has kept some investors away from the stock exchange.

优质股票的缺乏使得一些投资者远离股票交易。

《柯林斯英汉双解大词典》

The union leader said they had already raised issues of fallen stock, shortage of fodder and the price of buying additional feed but he feared the cost of animals losses could be enough to drive some farmers out of business.

BBC: Farmers plead for snow emergency aid to Welsh government

An acute shortage of money had occurred on the New York Stock Exchange, and brokers were intensely anxious.

NPR: Lessons from Wall Street's 'Panic of 1907'

There's no shortage of liquidity to fuel the economy--and the stock market.

FORBES: Uncertainy=Equity Opportunity