Hi Howard
I would say that the trading community probably does recognise the importance of stationarity. I'm just speculating though. Let me explain.
The data science community tends to include members, most of which have mathematical and/or science backgrounds. So they learn about the theory, practice, and important here, nomenclature. Whereas the trading community tends to include a large number of members without any such background, and hence they tend to be less sophisticated*. They tend to teach themselves as they go along. So they dont always use the accepted scientific language or notation. However, I often see statements similar to 'systems will be profitable when they are in sync', which in my mind is basically a laymans way of stating stationarity.
Anyway, this is just anecdotal opinion, and of course ymmv. I havent actually surveyed the entirety of the trading community...
*Also, please note, I'm not suggesting less sophisticated means dumb, or any other such aspersions.
CK
Posted by: "Edward Pottasch" <empottasch@skynet.be>
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