In 2017, the Securities and Exchange Commission (SEC), made a change for security settlements. The SEC adopted an amendment to the settlement cycle rule, Rule 15c6-1(a) under the Securities Exchange Act of 1934, to shorten the standard settlement cycle for most broker-dealer transactions from three business days after the trade date (T+3) to two business days after the trade date (T+2) standard. On September 5, 2017, that change became effective.