It would be better termed "marginal utility of income" to avoid confusion with the utility derived from holding cash balances.

最好是称为“收入边际效用”，以免与持有货币资金的效用相混淆。

youdao

Some asset prices have been inflated (especially gold and bonds), but overall inflation has remained relatively low because people and businesses have been holding large cash balances, and banks have parked their excess reserves at the Fed for a risk-free return.

FORBES: The Federal Reserve's Crony Capitalism

With the Federal Reserve holding short-term interest rates down to next to zero, cash balances have indeed yielded nothing.

FORBES: How Cash Became Cool