Planetary boundary layer (PBL) Planetary boundary layer (PBL), also called atmospheric boundary layer, the region of the lower troposphere where Earthâs surface strongly influences temperature, moisture, and wind through the turbulent transfer of air mass.
Portfolio optimization tools are useful to assist planners, advisers, and clients in ways to conceptualize the asset allocation problem. But, they should not be relied upon as the primary tool for structuring an investment portfolio.
What is a 'Portfolio Manager'. A portfolio manager is a person or group of people responsible for investing a mutual, exchange-traded or closed-end fund's assets, implementing its investment strategy and managing day-to-day portfolio trading. A portfolio manager is one of the most important factors to consider when looking at fund investing. Portfolio management can be active or passive, and historical performance records indicate that only a minority of active fund managers consistently beat the market.