Geoff Mackenzie wrote:

over n out

Pedants mode on: "over" means "I have finished speaking
and require a reply". "Out" means "I have finished
speaking and do NOT require a reply". Therefore "over and
out" has entirely contradictory meanings. Constantly
misused in WW2 films since the forties.

Probably won't bother the OP much, I suppose.

All that usage in films has established "over and out" as a
bona fide expression, surely? If the OP had just written
"out" I wouldn't have known what he meant.

Maybe it makes sense if you take it to mean "I'll still be
listening but shan't reply"

Here's a paradox:

http://www.answers.com/topic/over-and-out

Reminds me of "This statement is not true".

Or perhaps it actually means "an oxymoron", as in "Microsoft
Works is over and out"?

Then there's:

http://dictionary.pokerzone.com/Over+and+Out

Finally:

http://www.internetslang.com/OAO.asp

I might add that the OP is quite a good writer. In a couple
of paragraphs he has established a character in all
essential details, baited us with a list of desirable audio
gear, and hung it all on the device of a rhetorical
question. Perhaps formula stuff you might expect in a
mediocre novel or a magazine article, but an impressive
contrivance all the same, IMHO.

Maybe his attenuated grammar is normal in financial markets?
Otherwise it doesn't quite fit with the rest of his persona.

Ian