A statement issued by the Taiwan Stock Exchange (TWSE) was scant on details but did say that the trading of HTC shares and securities will be halted from Thursday, with no mention of when the exchange will resume normal trading.
TWSE said the closure of share sales and purchases has been made "pending the release of material information," and "the company will apply for resumption of trading after."
HTC has been even briefer, and in a bullet-point statement of sorts, said that "HTC does not comment on market rumor or speculation."
The Taiwanese phone maker is referring to an earlier report, originally from the China Times, which suggested that the company may be acquired in the near future by Google's parent company, Alphabet.
Now that HTC has ceased trading on the stock exchange, these rumors are once again on fire.
The Chinese publication suggested that buyout talks have entered their final stages, but it was not HTC's virtual reality unit Vive that was at the heart of discussions, but rather the smartphone business.
In what the China Times calls a "strategic investment," such a deal could resolve HTC's financial issues, of which the firm has been running at a loss for the past year, reporting a $72.4 million loss in Q2 2017 alone.