主 講 人：牛維方 博士 (鉅融資本管理公司/騰網知識科技開發 投資長) 
講    題：How to visualize the risk structures of the financial markets?
日    期：98年11月10日（星期二）下午2:30 –3:20
地    點：數學系(科學館S433室)
Abstract
As a tenet in investment, diversification may be the most important guideline for the practitioners 
and researchers. However, a formally operatable definition for the concept seems unavailable. 
To construct a well diversified portfolio and explore the structures of the markets, the following steps 
are suggested. First, a universe of attainable assets should be specified. Next, a measure for the distances 
between pairs of assets is established. Finally, with multidimensional scaling or other dimension reduction 
methods a market map can be formed. Simple diversification strategies then can be built based on the map. 
Empirical results on several major markets also revealed the effectiveness of this approach.