The CIO at VolkswagenStiftung this week revealed a number of reasons why the 鈧2.7bn German charitable foundation is finding it difficult to allocate capital to .

Speaking at the Sp盲nglerIQAM investment seminar in Vienna, Dieter Lehmann cited political risks, private-equity structures and correlations as factors.

鈥淢any of these investments are linked to state subsidies which in fact create an artificial setting,鈥 he told delegates.

He added that the private equity format of many infrastructure investments is a problem for some non-profit organisations in Germany because they 鈥渃ould lose their tax-free status鈥.

Lehmann said he also was 鈥渘ot really interested in infrastructure鈥 because VolkswagenStiftung鈥檚 portfolio already had a well established real estate exposure 鈥 at 14.4% as per year-end 2013 鈥 and the two asset classes are 鈥渢oo much correlated鈥.

In addition to the 鈥渟trict regulatory requirements鈥 associated with investing in infrastructure, Lehmann also mentioned that many new funds that had set up in the sector had experienced difficulties in sourcing investments.

The comments coincided with an announcement from German alternatives manager Yielco that it had raised 鈧155m from German insurers and pension funds for its first infrastructure fund of funds.