Pairing off can occur only by brokerage firms colluding with one another. Proper settlement of short and long positions require the delivery of physical securities be made within three business days after the transaction. By settling these positions with cash payments, the brokerage firms are able to manipulate the market by trading non-existent shares and circumventing settlement regulations.
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разделять(ся) на пары; уходить парами; coll. жениться, выйти замуж (with)