Often times, when comparing past and current stock charts, one will see identical or similar patterns. This might be due for any number of reasons. I believe its probably a combination of a significant amount of investor psychology and a small amount of coincidence. Investors will react to crises or tectonic shifts in markets in the same way regardless of the time period.
So for example, I took a look at Rowan Cos. (RDC), a major provider of international and domestic contract drilling services, and a large holding of Robert L. Rodriguez’s FPA Capital.
First, lets get a big picture of the stock’s history.

Just from looking at the chart and without knowing anything about the company, you can tell that this is probably a company in a very cyclical industry by looking at the large number of steep advances and declines. So let’s compare a past decline with the current one we are now experiencing.

The chart above is from late ’97 to early ’99, a period of 482 days from top to bottom. The next chart will be our current situation.

The current situation is that RDC topped in the middle of ’08. It’s been 299 days since the top. So how can this comparison help us? Let’s think of the current situation. Last year, the world had the most spectacular run-up in energy prices and one of the most spectacular declines probably in modern history. Now the entire world is in recession and countries are doing their best to fight deflation. Can we really say that an energy services company like RDC has put in a bottom after only 299 days during brutal economic conditions when in the past it took 482 days to put in a bottom in what were probably comparatively rosier times?
I think the answer is no and that we won’t see a bottountil at least October of this year.
But on the other hand, can we also simply rely on what a stock chart looked like in the past in an attempt to predict the future? Can we forget about the fundamentals of the company? The answer to both questions is No. The goal of this post was mainly to convey my fascination with how similar price patterns can often repeat themselves over the course of history.
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