Earlier quoted context omitted.
If that happens house prices will go apeshit.
What's the argument for negative interest rates having any impact on house prices? I would think it would be mostly linear compared to 2%, 1%, 0%, -1%, etc... For example - if I have a 20 year mortgage on a $240,000 house @ 0%, I have to pay $1,000/month. If the interest rate is -1% then I have to pay ~$900/month. I don't know if that extra $100/month really moves the market on home prices that much.
$190,000 @ 5% interest
$210,000 @ 4% interest
$235,000 @ 3% interest
$275,000 @ 2% interest
$310,000 @ 1% interest
[Note - not exact numbers; 30yr mortgage; mortgage calculator.org via guessing numbers until the monthly was close enough to $1k]