Prosper has added a way to create a portfolio of loans targeting a certain risk level. Flavors include Conservative (target 8.55%), Balanced (9.20%), Moderate (10.40%) and Aggressive (11.56%). They work by creating standing orders for certain loans based on specified criteria. You can also create your own portfolio of standing orders to create a customized portfolio. Obviously taking a page from the Zopa UK handbook, but a good addition overall that highlights the versatility of the platform.