Google it but normally when the market detemines a stock position can be manipulated there are limits placed on orders or suspension of trading.

Why would the SEC suspend trading in
a stock?
The SEC may suspend trading in a stock when the
Commission is of the opinion that a suspension is
required to protect investors and the public interest.
Circumstances that might lead the Commission to
suspend trading include:
• A lack of current, accurate, or adequate
information about the company, for example,
when a company is not current in its filings of
periodic reports;
• Questions about the accuracy of publicly
available information, including in company press
releases and reports, about the company’s current
operational status, financial condition, or business
transactions;
• Questions about trading in the stock, including
trading by insiders, potential market manipulation,
and the ability to clear and settle transactions in
the stock.