These are definitions for Nasdaq-listed securities:
D = Deficient: issue failed to meet Nasdaq's continued listing requirement
E = Delinquent: issuer missed regulatory filing deadline
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Q = Bankrupt: issuer has filed for bankruptcy
G = Deficient and bankrupt
H = Deficient and delinquent
J = Delinquent and bankrupt
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K = Deficient, delinquent and bankrupt