Quote from Lefty62151:
Hello:
I am not trading during the lunch hour and this comment caught my attention. I think I understand the idea you are putting forth, but I suggest that there may be fundamental information that is not captured in classic pairs trading strategies.
For instance, the "classic" pairs trade is the Royal Dutch Petroleum/Shell Transport trade. Both entities part of the same conglomerate. Actually Shell Transport has a historically higher correlation with BP (British Petroleum) than it does with its own sister company Royal Dutch Petroleum. In the past decade or so, the spread between Royal Dutch and BP has widened significantly about a dozen times, always falling back into a range.
The strategy has been to wait for Shell's share price to approach BP, then bet that the spread will increase by going long Shell and shorting BP. Like most anomalies, if there were no value in the spread, speculators wouldn't touch it.
I can think of plenty of other examples including my favorite this year which is playing sectors against the larger market. I am not a scientist, but I appreciate the difference between logical thought (theory) and practical application of fundamentals as expressed by market history.
Lefty.