Spanish to English Bus/Financial Accounting Informe de inversión

The whole thing is:

En el ejercicio 2005, la Fundación no ha realizado inversiones financieras temporales, habiendo recibido exclusivamente ingresos financieros derivados de excedentes de tesorería por remuneración de su cuenta corriente bancaria.

Where I get lost is the end, from excedentes onward Here's my crack at it:

During 2005 the Foundation has not carried out any temporary financial investments, having solely received financial income deriving from the cash surplus in its current account.

Is it ok, or oversimplified? And is that 'cash surplus'?