An email from one of the lenders. I wrote back. “thanks. that makes sense.” she replied “glad i could help.”

Dean, order

All of our 7/1 ARMS are LIBOR, Treasury or CMT. We don’t offer MTA
based for 3/1’s through 10/1 ARMs. Although we do offer the 1 Month
MTA which is a Pay Option ARM. Also we can offer a FLEX 3 or FLEX 5
which turns into a Pay Option ARM at the end of the 3 or 5 year fixed
period. Thank you!