Owned by many financial companies including the New York Stock Exchange (NYSE), 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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