The essence of the settlement issue can be summed up
as -- nothing good can happen between trade date and settlement, only bad
things can happen. And the longer the settlement cycle, the greater the risk.
In 1993, the Federal Reserve Board noted that settlement systems for securities
were a potential source of “systemic disturbance” to financial markets and the
economy. In the Board’s view, the ideal scenario was settlement immediately
after execution and payment in same-day funds. The longer the period from trade
execution to settlement, the greater the risk that one of the parties may
default on the trade. In addition, the larger the number of unsettled trades,
the greater the opportunity for prices of the securities to move away from the
contract price – thereby increasing the risk that non-defaulting parties will
incur a loss when replacing unsettled contracts. The biggest concern of the
Commission is systemic risk – or the inability of one market participant to
meet its obligations when due, which will cause others to fail to meet their
obligations. And while the Commission believes that the threat of a serious
systemic disruption to the US financial markets from a settlement failure is
small, it is still a serious concern. It was this type of concern – propelled
by the 1987 Market Break and the 1990 bankruptcy of Drexel Burnham – that
caused the Commission to adopt rule 15c6-1 – shortening the settlement time
frame from T+5 to T+3.
http://www.fisd.net/referencedata/20040512SECRelease.pdf
2004-09-21