Explain the following statement: a stock held as a part of portfolio is generally less risky than

Question:

Explain the following statement: “a stock held as a part of is generally less risky than the same stock held in isolation.

Portfolio
A portfolio is a grouping of financial assets such as stocks, bonds, commodities, currencies and cash equivalents, as well as their fund counterparts, including mutual, exchange-traded and closed funds. A portfolio can also consist of non-publicly...