Introduction

This book describes five qualitative investment decision-making methods based on the hesitant fuzzy information. They are:

• (1) the investment decision-making method based on the asymmetric hesitant fuzzy sigmoid preference relations,
• (2) the investment decision-making method based on the hesitant fuzzy trade-off and portfolio selection,
• (3) the investment decision-making method based on the hesitant fuzzy preference envelopment analysis,
• (4) the investment decision-making method based on the hesitant fuzzy peer-evaluation and strategy fusion,
• (5) the investment decision-making method based on the EHVaR measurement and tail analysis.