Goldman Sachs Group Inc. is accustomed to winning, but its dark pool lags far behind private stock-trading systems run by its fiercest rivals. It has a plan to start turning that around.
The bank is debuting a new dark pool on Friday. At first, only two stocks will trade on the new platform, dubbed Sigma X-Squared, but everything else will be shifted over within about a month from the older Sigma X system, which will be shuttered, according to a client memo obtained by Bloomberg News.
