Yesterday's extreme trading volume caused serious delays in the delivery of information to customers of Goldman Sach's clearing business this morning.
Ordinarily, clients can access updated custody reports on the Goldman Sachs Execution & Clearing website as early as three or four o'clock in the morning. These reports let customers know what positions they hold in various financial assets, including futures, options and equities.
Because of the unusually high volume of trades yesterday, Goldman's processing of the custody reports was delayed, according to spokesman David Wells.
Goldman posted a message on its website explaining that custody reports were delayed. While intended to keep clients informed, it spooked some who worried that it signaled larger problems.
"I had no idea what was going wrong. I feared the worst," one Goldman client said.
Wells said that 95 percent of clients had access to their information by 7 a.m. He also claims that all clients had access to the reports by the time the market opened.
This conflicts with what some clients have said. At least two clients have told CNBC.com that they were still unable to log in to their reports for some time after the market opened. This may have been isolated to a small number of clients.
Goldman said the problem was not with its prime brokerage business and did not affect large hedge funds. Rather, the problem was with its execution division.
—An earlier verision of this post incorrectly identified the Goldman platform at issue.