That message was not lost in China. Several local reports quoted a line by Charles Li,
the head of Hong Kong's stock exchange: "Those who travel far always come home some day."
Yet it is premature to proclaim an end to Chinese voyages to the American stockmarket.
Indeed, these have so far looked like an exception to the trade war.
Just about every facet of the two countries' economic relationship has suffered: trade, investment and even tourism have all declined.
But last year more than 20 Chinese companies listed in America, an eight-year high. Another dozen have listed this year.
Chinese firms benefit from deeper liquidity than they can get at home, and more flexible regulations.
Profitability requirements have all but blocked Chinese tech firms from mainland exchanges.
Last year Hong Kong drew nearer to the American norm by allowing founders to own shares with superior voting rights.
But several rising tech stars still opted for Nasdaq, including Pinduoduo, an e-commerce firm, and iQiyi, a video-streaming service.
"They view the American market as the gold standard," says Drew Bernstein,
the co-head of the China practice at Marcum BP, a firm of accountants.
America has benefited, too. The presence of strong Chinese companies has reinforced its stockmarket's position as the world leader.
A series of scams, mostly involving smaller companies, have damaged the reputation of Chinese stocks.
But bigger stocks have fared well (Alibaba trades at more than double its IPO price), providing investors with growth and variety.
America's exchanges would be loth to part with them.
Shortly after Mr Bannon's interview was published,
Bob McCooey, a senior vice-president with Nasdaq, sent out a message to his contacts on WeChat, a Chinese messaging service,
which spread quickly among Chinese investors.
"Like many of you, I have seen the comments by President Trump's former and discredited adviser Steve Bannon.
I do not believe these words to have any truth," he wrote. Nasdaq, he added, still welcomes Chinese companies.
It is a message he is likely to find himself repeating.