Provide a technical explanation of why portfolio risk gradually becomes all systematic (market) as the number of

Question:

Provide a technical explanation of why risk gradually becomes all systematic (market) as the number of securities in the (n) gets large. 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...