Yes, INVESTMENTS is a Scrabble word!

Letter values in Scrabble US: I 1, N 1, V 4, E 1, S 1, T 1, M 3, E 1, N 1, T 1, S 1.

Is it a valid word?

INVESTMENTS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

the act of investing; laying out money or capital in an enterprise with the expectation of profit
money that is invested with an expectation of profit
the commitment of something other than money (time, energy, or effort) to a project with the expectation of some worthwhile result
outer layer or covering of an organ or part or organism
the act of putting on robes or vestments
the ceremonial act of clothing someone in the insignia of an office; the formal promotion of a person to an office or rank

Also: investment funds.