We had an $84K balance on a $1.1M home. Most of my neighbors are carrying $800k to $900K balances. I don't see their arbitrage game working out too well for them. I see them digging themselves into a deeper hole. But they do have nice cars and boats. I can have anywhere from $300K to over $800K cash from bond maturities and interest payments floating in money market funds waiting, at less than current mortgage rates, waiting for my next investment. For your argument to make any sense, all of your investments, including cash balances, has to earn more than your mortage interest payments. Can you really make that claim?
You're rolling apples-oranges and straw-men all together in that post.
"But they do have nice cars and boats" - Irrelevant. Just because some people may make bad financial decisions with their debt, doesn't mean that responsible people can't make good use of it. If you apply that logic, just about everything in our daily lives is off limits to everyone (knives, chairs, cars, alcohol, etc).
And when someone resorts to bad arguments, it makes me wonder about their larger point.
I only keep enough cash for liquidity to pay bills. For the difference in a mortgage amount I would consider holding, I would not make adjustments to my AA. So the return from my entire portfolio is what makes sense to use for reference.
So yes, I'm betting the long term return on my portfolio exceeds the mortgage costs. I might lose that bet, but it's unlikely, and it's unlikely it would be by much. I'm willing to take that bet, as I feel the odds are in my favor. It's not my only bet, and it's not a huge bet. In the long run, the sum of those bets are very likely to pay off.
You can chose to not make that bet, nothing wrong with that. But please don't misrepresent it.
-ERD50