Shady housing market chart

These housing market charts do not look shady to me

I shared a chart recently on Twitter that got some attention:

But not just any attention (though I do appreciate all your likes and retweets). This was special. Robert Allison [at]RobertAllison__ at SAS replicated the chart with SAS software and wrote a blog about it. These mortgage rates look shady to me. I worked on a lot of SAS stuff early in my days working at Freddie Mac, and Robert’s SAS graph examples were a resource I often used. Him taking the time to blog about one of my charts was really cool.

These days I use R more than SAS, but I hadn’t gotten around to posting the code for my chart. Let me post a modified version of the chart I tweeted out, incorporating some of the constructive criticism I got received after posting it.