A Financial Times report finds slow growth in the UK for Fidelity and AllianzGI funds with variable fee structures that charge investors when the fund outperforms at certain levels. Nine of 12 such funds managed by Fidelity held less than £60 thousand last year, the FT reported. AllianzGI launched five variable fee funds and three of those managed less than £30 thousand at the end of 2018. The report says investors are skeptical of variable fee funds because of their complexity and unpredictability. People quoted in the report say variable fee funds may need more time to establish performance and a track record that differentiates them from performance-fee related structures of the past.