So far, the stock exchange is the only truly profitable activity I have undertaken. I think the mistake is that stock exchange shouldn't count in with comodities which are loaded in ship only or station warehouses and should count in only with comodities in trade stations and exchange stock stations.What I have observed this should apply to all comodities.Try it.This should be solved for future patch. It's my first time playing X3 (Albion Prelude), I've logged over 50 hours on an Argon Peacekeeper start (I now fly a Centaur), and I'm trying to accumulate wealth so I can eventually have my own fleet. Then i thought to return to the first argon border sector and my load of lasertowers in my ship filled supply of demand,so best time to buy all shares,then I flew to the next non-argon sector and all shares sold again and this procedure can be repeated continuously.After 30 minutes of flying between two sectors only I earned about 60M cr without selling lasertowers load. A new Stock Exchange feature will enable players to speculate in local markets in a bid to increase their wealth. This new adventure will also feature more than 30 new ships and stations. Supply filled demand and price of shares are lowest,so I bought all shares.Then I tried load this lasertowers to trade ship and fly out of argon sector and what's happened?In the exchange stock is zero supply of demand and now the share price is highest.I sold all shares,because the share price is highest and profit is about 3M cr. X3 albion prelude is the new X3 game that will be released on 15 December 2011. After made about 31 pieces of lasertowers I found that what I have in the complex warehouse, exchange stock counts in and I can see it in exchange stock window. I now 51million credits I bought all 172000 shares in a company, and that is steadily increasing after paying 10 million for the shares it has a net profit of about 2million at the moment, I calculate at least 20 million net profit if the shares reach.

I put a Satalite in the stock exchanges and kept monitoring it. Initially I intended that I produce Lasertowers because according the exchange stock were zero supply of demand of lasertowers. I have invested now 27million credits (all i had) into the stock market.

X3 albion prelude stock exchange