Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Why could rental costs for apartments/houses rise while buying prices can go up and down?
Average rent rates will typically rise and fall, and are market-dependent just like real estate. In the short term, a collapse in housing like the one we saw in 2008 can induce a spike in rental costs as people walk away or get foreclosed on, and move back into apartments. That then tends to self-adjust, as the people who had been in the apartments find a deal on a foreclosed house and move out. However, one thing I've seen to be near-constant in the apartment business is that a landlord will offer you a deal to get in, then increase the rent on you from year to year until you get fed up and move. This is a big reason I didn't have the same address for two years in a row until I bought my house. The landlord is basically betting that you won't want to deal with the hassle of moving, and so will pay the higher rent rate, even if, when you do the math, it makes more sense to move even to maintain the same rent rate. Eventually though, you do get fed up, look around, find the next good deal, and move, "resetting" your rent rate. I have never, not once in my life, seen or heard of any landlord offering a drop in rent as a "loyalty" move to keep you from going somewhere else. It's considered part of the game; retailers will price match, but most service providers (landlords, but also utility providers) expect a large amount of "churn" in their customer base as people shop around. It averages out.