US multi-asset brokerage Interactive Brokers Group, Inc. (NASDAQ:IBKR) has recently released an update to its Trader Workstation (TWS) platform, with the latest build of the terminal (build 952) introducing extra support for bond ratings and a new correlation coefficient chart indicator.
Bond Ratings
The Contract Description now includes additional bond ratings in addition to Moody’s ratings. Bond rating subscribers will see all available ratings laid out in a row separated by a slash (/) in the Contract Description field and if the field is added, in the Bond Rating field.
To see the various ratings, traders should hold the mouse over the description for example MOODY: AA3, FITCH: A+. The Fitch and S&P ratings are also now included along with Moody as filters in the US Corporate and US Municipal Bonds scanners.
To see bond ratings, one must subscribe to “Moody’s Ratings” fixed income 
bond data through Account Management. This single subscription covers all available bond ratings.
New Chart Indicator
The latest TWS build has added a new comprehensive chart study, Correlation Coefficient to charts.
The Correlation Coefficient (PPMCC) measures the linear correlation or dependence between two variables, in this case between two securities, in an attempt to show how closely the securities are related to each other. The value is positive if both securities move in the same direction (either up or down) and negative if they move in opposite directions.
To use the Correlation Coefficient, traders should click Edit>Studies from within a chart and in the Comprehensive Studies section select the indicator.
To learn more about TWS’ latest build, click here.