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 it is: Portfolio management refers to the professional management of securities and other assets. How it works (Example): Portfolio management includes a range of professional services to manage an individual's and company's securities, such as stocks and bonds, and other assets, such as real estate.