Chill

Special restrictions that can be placed on a given security by the Depository Trust Company (DTC). Chill restrictions are intended to limit the potential for problems within the financial marketplace; they can be placed on a security for various reasons.

Investopedia Says:
Owned by many financial companies, including the New York Stock Exchange, the DTC acts as a clearinghouse for stock exchange securities, settling trades in corporate and municipal securities. If the DTC has cause to be concerned about a specific security currently processed through its system, it may place a "chill" status on the security. This will restrict brokerages' ability to transfer the shares or units of the security through DTC until the security's issues are cleared up or it ceases trading on the market.

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The relinquishment of legitimate First Amendment rights by individuals fearful of the possible or threatened application of laws or sanctions and subsequent prosecutions, whether or not successful, indirectly resulting from the exercise of those legitimate rights.

In recognition of the chilling effect of statutes that may be constitutionally overbroad, a facial attack on such statutes is permitted by any person properly before the court even if he or she lacks personal standing to assert the facial invalidity of the statute because his or her own conduct falls squarely within some valid application of the statute. See 380 U.S. 479; 472 U.S. 491, 503.