What is the fine-grained topic of the following text: Harriet Davies, who wrote a statement for the survey, said "demand for property is not only being driven by low interest rates," which are bound to increase in the current climate, but "structural shifts mean that real estate is likely to grow in importance for HNW investors." Only return the topic.
The influence of structural shifts and interest rates on real estate demand among high-net-worth (HNW) investors.