Mortgage LoanMortgage LoanMortgage debt obligation evidenced, or when made will be evidenced, by the Loan Documents or a mortgage debt obligation with a Fannie Mae credit enhancement. with an interest rate that periodically adjusts based on an IndexIndexBasis for determining the Gross Note Rate of an ARM Loan, including any required alternative index that may be determined necessary by Fannie Mae because the Index is no longer widely accepted or has been replaced as the index for similar financial instruments. per the NoteNoteInstrument evidencing a Mortgage Loan obligation, including Form 6010 (series), any other note approved by Fannie Mae, and all applicable addenda, schedules, and exhibits. or Loan DocumentsLoan DocumentsAll documents evidencing, securing, or guaranteeing the debt obligation executed for a Mortgage Loan and approved by Fannie Mae. .