Morgan Stanley (MS) will be changing its rules for assimilating orders in dark pools, Bloomberg reports. The change is aimed at stimulating institutional clients into bigger trades.

The new policy will be directed at rewarding size and de-emphasizing speed. MS Pool will use a model similar to that of Nasdaq OMX Group. The U.S. bank operates venues in the U.S., Europe, Hong Kong, Japan and Australia that match buyers and sellers without showing bids and offers.

Click here for the story from Bloomberg.