How many property investors are losing money on investments?

There's a fair bit of housing jargon getting thrown around these days, Capital Gains Tax is one we've heard a lot about lately. But one we don't hear much of in Aotearoa is "Negative gearing." That's when you make less money from a property investment than it costs you to keep it. It's the subject of conversation in Australia, as the country is chewing over changes that could put new restrictions on landlords. But what about New Zealand - how many property investors are losing money on their investments and why is it even a thing? Money correspondent Susan Edmunds spoke to Lisa Owen.