The year was 2002. That was quite a rude awakening for not only me, but every landlord in our nation's capital. What do you do with all that vacant space in such a short period? The answer: Lower your rental rate. Tenants began filling vacancies and getting better office space. It was a flight to quality.

But net lease investments are different when considering quality, which is a popular word these days. In the net lease investment industry, we're typically not discussing the leasing of a single-tenant office building, a large warehouse or a small retail center. We're discussing investments--the purchasing of assets for an immediate return.

So how does one define a flight to quality when considering a net lease? It depends who is buying.