I just bough my first condo in the Hyde Park neighborhood of Chicago.

I'm under contract to purchase some smaller multi's in rapidly changing neighborhoods.   

(Just fyi, this isn't an amazing neighborhood, probably B- so maybe tenants wouldn't care?)

if it was just based on the numbers,  I would.But I would not make that decision just based on the number, I would consider the neighborhood, the school district if it matters, the type of tenant I would get, the condition of the house, etc?

I have a rental in a neighborhood with an HOA.

hi i want to invest in baltimore and i need your sharing what are the good places to invest thank you

But to avoid that, you can try going to https://www.zillow.com/ and then filter by the number of beds and baths for all the rentals in the neighborhood your property is in by zooming in on the map.

Or your in an area were jobs leave and renters go with them.the other danger at some point is renters turn into owners.. that can have a impact.. although I look at our market here in the NW we have basically a 1% vacancy and a lot of that is because unlike most of the mid west deep south etc.. there are NO where NEAR the amount of SFR's that are rentals.. prices of SFR for a rental at best would break even but most would be severe negative cash flow so they are really only sold to homeowners and that does keep the neighborhoods in good shape.. the renters are in apartments..

Is it in a terrible neighborhood? 

We typically fill vacancies in 1-2 weeks and it sounds like you are in a good neighborhood, so let's find out what the issue is.