Portfolio: A collection of financial investments like stocks, bonds, commodities, cash, and cash equivalents, as well as their fund counterparts.

A Portfolio, in the context of finance and investing, refers to a collection of financial investments like stocks, bonds, commodities, cash equivalents, and fund units held by an individual or a corporate entity. It serves as the foundation of an investment strategy, designed to achieve specific financial goals. Here are some of the key elements that someone in business and the world of investing should know about a Portfolio:

1. Definition: A Portfolio refers to a range of investments held by an individual or an institution. The objective of a portfolio is to diversify investments to spread risk and achieve a desired return.
2. Composition: The composition of a portfolio can vary greatly depending on the investor's risk tolerance, investment horizon, and financial goals. It can include a variety of asset classes such as equities, bonds, cash, real estate, or derivatives.
3. Portfolio Diversification: Diversification is a risk management strategy that mixes a wide variety of investments within a portfolio. It aims to reduce risk by investing in different areas that would each react differently to the same event.
4. Risk and Return: The risk and return of a portfolio are determined by the performance of the individual securities it contains. The risk can be mitigated through diversification and asset allocation strategies.
5. Asset Allocation: Asset allocation is the implementation of an investment strategy that attempts to balance risk versus reward by adjusting the percentage of each asset in an investment portfolio according to the investor's risk tolerance, goals, and investment time frame.
6. Portfolio Management: Portfolio management involves making decisions about investment mix and policy, matching investments to objectives, asset allocation, and balancing risk against performance.

Understanding a Portfolio is essential for anyone in business and the world of investing as it forms the basis of investment strategy and decision-making, playing a critical role in determining the overall financial success of an individual or business.