We have some properties that have spiking property value increases and sustainable cash flow (GTA) and others (like in Timmins) have slow property value increases with very high cash flow.   

The most recent publication (used by the Department of Number's)  original source is actually the Bureau of Economic Analysis (via the US Dept. of Commerce), which also listed the top growing GDP for South Dakota as Agriculture, Fishing, and Forestry, followed in Q4 2019 growth spikes in Utilities, and then Retail.  

All of this experience has come from the Kansas City, MO market area, but the insights are likely similar across many middle markets, and potentially beyond.So, MY 5 Intuitions of Real Estate in 2020C class is prime for a spike -C class is prime for a spike because of economic fear. 

But if it were actually like CA then prices would spike back up quickly too.

Will there be a huge spike after things are allowed to go back to "normal?"

Unemployment has spike to high levels, so most sizeable landlords are going to have defaults. 

If the tenants are good don't spike the leases.

We have seen a spike in Roth conversions this year due to the affects of COVID-19 on people's finances.  

Something to keep in mind is if there isn't anything you can do to improve the property massively from a value standpoint, your FHA loan will be stuck to the property unless you have a rather large appreciation spike in the area. 

You may get a spike during the Summer months but an overall answer is all the time.