"Is Financial History Bunk?
Henry Ford said it first and best, “History is more or less bunk”. Is financial history any different? I ask myself that question a lot lately, almost every time I read something where the analysis compares the current “recession” to the average of something in a prior recessionary period.
For starters, there are precious few prior periods, with less than a dozen downturns worth the name in the last century. So we’re already working from a tiny sample size.( TRUE )
Second, there are oodles of reasons to expect that such situations are closer to unique than analogous. Is the previous example a recession? A depression? Was it in the U.S.? Where were rates going into it? Was it consumer led? What was inflation at the outset? Where was unemployment? What triggered the downturn? What was consumer debt load? I could go on and on, but you get the point I’m sure: History is awfully flawed as a guide for what is going to happen next when you’re dealing with small sample sizes and when inter-period situational variance is so high.( A GOOD POINT )
So, why do it? Why talk about which sectors lead in/out? Why mention that this is the best two-day week in modern market history? Why talk about the length of typical recession since WWII? Why go to any of those lengths? In part because it makes people feel better, which is nice( I AGREE. IT'S A POSITIVE NARRATIVE. ); in part because it gives market analysis the patina of a science( IT'S NOT ), which is wrong but also nice. And, yes, there is also that sometimes there is even some validity to it -- that, all else being equal (which it rarely is), we might things to unspool in a similar way this time as they did the last time something like this happened.( TRUE )
The risks of financial history are higher than ever though. We have more data, better analytical tools, and more people crunching the data, so we can expect to see data on pretty much anything we want to see. There will always be someone tearing apart something to find something interesting, so something interesting will be found. My friend James Altucher has always been great on this subject, ripping holes in pretty much every data-driven rule of thumb by which people claim to trade and/or find market tops and bottoms. They mostly don’t work.( TRUE )
Thoughts?"
"Excel Wankers and Recession Averages
Averaging pretty much anything to do with historical recessions & related bear markets is a meaningless exercise in spreadsheet-based thumb-sucking. Leaving aside my "financial history is bunk” rant, it doesn’t matter whether you’re averaging recession length, severity, or whatever, it’s all pretty much spurious and bullshit. ( IT HAS A LITTLE USE. )
A quick example: There have been nine recession-induced bear markets in the U.S. since the Depression. They have ranged from just under 100 days long, to a little over 900 days. The average (there’s that dangerous word) is 486 days, with a whopping standard deviation (another dangerous word) of 250 days. In other words, based on this tiny data set -- and that is a big part of the problem -- we could expect (ahem) recessions to last anywhere from 0 (okay, -12 actually) to 1,000 days. But it's all crap, from applying averages, to applying standard deviations, to sample sizes, but people pretend it isn't.
The upshot? We have no flipping ideas how long recession-induced bear markets last, and anyone who pretends otherwise is an Excel wanker." ( TRUE )
I agree. These historical comparisons are of limited use, due to the difference in historical context. As well, much of what we're seeing is correlative reasoning, which has some limited use, but doesn't qualify as law-like behavior. Much of what we're doing is simply what we believe is best, and we dress it up with history and models that support our views. Most of the comparisons with the 1930s and the references to Keynes really qualify as narrative placebos, that help us feel better than the comparisons warrant, but we need the help in fighting the fear and aversion to risk, which is endemic now. A Human Agency explantion understands the place of Narrative Thinking, which is all a lot of Economic History and Economics is. They are simply the explanations and theories of more sophisticated medicine men, which is not an insult. Our culture needs its own medicine men to survive. Call them scientists if it helps you feel better.
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