Investor certainty around interest rates played a big part in 2019′s record cap rates. "The expectation of the last few years has been interest rates are probably going up so people are waiting to buy because prices will go down," Blankstein says. "But now people think we're in a stable interest rate environment that is probably not changing for a year. So, it's really causing the market to heat up because you can buy with some stability at the moment."

This economic climate also powered sales volume in 2019. Blankstein believes sales activity across all single-tenant net leased properties will surpass 2018's $59 billion.

In the fourth quarter of 2019, the net lease market experienced a decrease in property supply of approximately 10%. For the quarter, the number of single tenant net lease properties on the market fell by 9.54% to approximately 3,900 properties. Office properties available declined by 13.2% to 475 properties and industrial properties totaled 358 listings, a five-percent decline.

"People are feeling good that they can expect this [economic climate] until November of this year," Blankstein says. "I think the consensus is that until the Presidential election takes place, there are not a lot of major events that will impact the market."

Even if there are issues after the 2020 election (as there were in 2016), Blankstein says net lease properties, which are often long-term investments, can weather the storm.

"If you believe that two or three years from now, there will be downward pressure on rents or some type of recession, you could argue it's a good time to get into net lease because of the stability of cash flow," he says. "That's why the market is still driving prices lower. Cap rates down in the 6's are still favorable compared to the apartment market, treasury bonds and other alternatives if you're a conservative, older investor."