The bid size lets you determine the maximum size of a position in your portfolio. The smallest bid amount you can set in Portfolio Pro is €1. Smaller amounts are not invested. If you enter a higher bid size (for example, €10), it’s often the case that Portfolio Pro's bid will be lower than that (e.g., €1) when the demand for a loan is high. This happens when more investors are bidding on the same loan than a higher distribution per investor can be achieved.
Since we want you to realize a portfolio according to your chosen risk-return strategy and not to compete with other investors through limited access to specific loans, bids from €1 are being implemented automatically by Portfolio Pro in these cases. No additional intervention is needed from you.