What I will point out is the trade settlement process that seems to be so elusive to some. Posting "day of non-settled trades" has nothing to do with the actual settlement of shares.
T+1 NSCC’s guarantee of settlement generally begins midnight between T+1 and T+2. At this point, NSCC steps into the middle of a trade and assumes the role of central counterparty, taking on the buyer’s credit risk and the seller’s delivery risk. This guarantee eliminates uncertainty for market participants and inspires public confidence. T+2 NSCC issues broker/dealers summaries of all compared trades, including information on the net positions of each security due or owed for settlement. T+3 T+3 is settlement – the delivery of securities to net buyers and payments of money to net sellers. Broker/dealers instruct their settling banks to send or receive funds (through the Federal Reserve System) to/from DTC as NSCC’s agent. Securities generally do not change hands physically. DTC transfers ownership between broker/dealers’ accounts by book-entry electronic movements.
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