I gave a talk last night to a group of clients, part of which included a discussion of the possible reasons behind recent market turbulence. Afterwards, a client asked me what else, beyond what I had discussed, could have caused the downturn? I thought that was an interesting way to look at how we as investors should watch markets.

Yesterday was another rocky day for U.S. markets, with substantial declines across all major indices. It brought us close to the lows of late August, and the question now is, will we go lower this time?

Last week’s data was mixed, but on the whole it wasn’t too bad. Let’s take a closer look at the economic news.

The Fed seems to realize that the message markets took from last week’s decision not to raise rates was not, in fact, the one it wanted to send. Since that decision was announced, we have seen statements from several committee members making the case that it was a “close call” and that a rate increase is still in the cards this year—probably in an attempt to mitigate the markets’ worries. What has been missing, though, is some indication of what the most important member, the chair, thinks about the whole thing. Now we know.

Although growth in the U.S. continues at a reasonable rate, there are undeniable signs of a more global slowdown, especially in China. Even though we are doing reasonably well, the slowdown in the rest of the world does affect us.

One of the ideas I play with occasionally is that of long-term social cycles. Strauss and Howe’s book The Fourth Turning is a good example of how demographic cycles can alter society; it’s also a recommended read.

It was almost two years ago that I wrote “Here we go again” about the pending government shutdown. Well, here we go again—again—as a shutdown looks increasingly likely.

Last week was a busy one, with the release of important data for business and consumers, two macro reports, and the Fed’s decision on raising interest rates. Generally, the economic news in this Monday update is reasonably good and nothing to indicate worry.

I was pretty much right on my take that the Federal Reserve would choose not to raise rates yesterday. The U.S. economy is doing well, according to the statement, but rates will remain at zero due to worries about financial markets and the rest of the world. Waiting a bit longer has little downside compared with the risks of acting now—or so the Fed apparently believes.

One of my favorite Sherlock Holmes stories centers around something that did not happen: a dog that did not bark when he should have. I was thinking about that story last night during the Republican presidential debates.

It wasn’t just the debates that recalled the story to me, but also how they were reported—lots of words on how Trump and Fiorina interacted; lots of words on how Bush played off Trump’s “low energy” comments. There was essentially nothing about the economy. Why not?