Hi Lukas,
there is a module, called slightly differently - Portfolio Analyzer - you use this component to calculate and monitor the rates of return (yields) on your financial assets. Portfolio Analyzer is designed to be used to measure the profits from investments from different perspectives and using different methods - please see more detailed description
http://help.sap.com/erp2005_ehp_06_hana/helpdata/en/42/daa4427868c811e10000000a1550b0/frameset.htm
Kind regards,
Renatas