3.6  Consumer Demand  Each turn there is a demand for various quantities of all commodities from consumers in the economy at large and this varies according to the size of the economy. These commodities are bought from the commodities market in the normal way at the current price (ie. with no premium). If this demand is not filled it does not accumulate. The balance is considered to have been made up by imports.
For every 10,000 spent on wages by the companies, there will be consumer demand for:-
1 Art, 20 Books, 30 Clothes, 4 Delicatessen, 60 Energy, 30 Farm Produce, 1 Gemstones, 3 Houses, 10 Instant Food, 10 Knick Knacks, 10 Luxury Goods, 2 Plant, 10 Raw Materials, 1 Safari Holidays, 50 Transport, 3 Vehicles, 30 Widgets and 1 Yacht.
Irrespective of the size of the economy there is additional consumer demand for:-
2 Books, 2 Clothes, 20 Energy, 10 Farm Produce, 1 Instant Food, 1 Knick Knacks, 5 Luxury Goods, 5 Raw Materials, 10 Transport, 1 Vehicles, and 10 Widgets.

3.7  Exports  Commodities can also be sold through exports, in which case they're not restricted by demand. The rules for setting up exports are the same as the rules for imports (see 3.4) except that the original sell price is used instead of the buy price.. Each company can have only one export line at a time (imports and exports are separate, so you can have both - but only one of each).

3.8  Buying & Selling Shares  Each company can buy and sell shares by setting a desired share holding and an offer price. Both values remain in force until you change them.
In the share phase if the company holds fewer shares than the share holding you've ordered then the company attempts to buy up to twenty shares at the offer price you've set. If the share holding is more than the level that's been ordered then the company attempts to sell all the spares.
Note: Each company can only buy 20 shares per turn in each other company. You can order more, in which case the company will continue buying in future turns. You can also buy more than 20 shares in the same turn if you buy them with more than one company. You're not limited in how many you can sell in a turn.
The price offered is the same whether buying or selling, but while the price offered is more than the current share price then any attempt to sell will be ignored and while the price offered is less than the current share price then any attempt to buy will be ignored. If you don't give a price (or you set it to zero) then you buy (or sell) at the current price.
Note: You can put an order in place so that you will buy or sell a given share at some time in the future if the share price reaches the price you specified.
Buys and sells are resolved by matching the buys and sells ordered by all the companies. Where the total number of buys and sells don't match then priority is given to the best prices (ie. the highest prices if you're buying and lowest prices if you're selling). Where different companies are offering the same price then the priority is company order (see 3.9).

3.9  Stores  Each company has a stores capacity, that is the total value of the commodities that may be stored without extra costs at the end of each turn. Any commodity stocks above capacity cost 5% of their value. Stores capacity can be increased by using the BUILD action (see 6.4).

3.10  Company Order  Where companies offer equal prices for buys or sells then the priority is decided by company order. At the start of the game the company order is random. For subsequent turns the company order is the order of which companies spent the most on ORDER actions (see 6.15), with companies spending the same amount remaining in the same order (i.e. your company moves up the company order, ahead of any that spent less, but not going ahead of any that spent the same).