The phrase "cash portion" refers to the amount of money that is paid in cash, rather than using other forms of payment like credit cards or checks. Full definition
I've been performing the quarterly update on the portfolios I manage and searching high and low for a bit more yield for the bond and cash portions of the portfolios. (barbarafriedbergpersonalfinance.com)
We'll be holding a larger cash portion in our portfolio until we retire, so that we have the option to borrow it in the near future and invest it elsewhere. (enchumbao.com)
Most investors divide their portfolios between stocks and bonds, with potentially a small cash portion. (investor.vanguard.com)