The term 'RED INK' is a metaphor for financial losses. The four crossword solutions for this term are LOSS (4 letters), DEBT (4 letters), DEBTS (5 letters), and NETLOSS (7 letters). LOSS is a noun that refers to the act of losing something or someone, while DEBT is a noun that refers to an amount of money owed by one person or entity to another. DEBTS is the plural form of DEBT, and NETLOSS is a noun that refers to the amount of money lost after subtracting all gains from all losses.