It was poorly written and was a convenient talking point about all the evil investors buying up property and turning the city into slums.The reality is that the worst effected areas, as the study you just citied is going to show, are concentrated and have been in decline for decades.  

People buy due to life events, understand why they buy or sell and concentrate on those folks.Ask people, even strangers, say, you know anyone wanting to buy or sell a home?

Concentrate on your 1099 position, find ways to increase your yield or you and your wife take other/secondary jobs. 

Or, are they mostly concentrated in few "bad" areas?

The typical reason given is the concentration in life sciences and technology.

@Curtis Yoder I'm thinking on trying to concentrate beyond buying their house.

I suggest you concentrate on paying off your student loans while honing your real estate skills. 

Took about 20  years off to concentrate on a 9-5 job and looking back on it, regret every moment, but then again, a great resource like BP was not available back then, let alone the internet itself. 

I'm New and honestly I've not yet decided which specific areas of real estate investing I want to concentrate on. 

Absolutely not, I traded that equity to get rid of my problem and concentrate on local investments that would yield high returns.