Working Stock\Share market

A working Stockmarket could provide another way for players to let their money work for them besides owning a business. It would also give more motivations to businesses to expand and provide better customer service. I think it could be possible if you used the ingame business and made a small little market around them to start off with. You could possibly adjust the prices every week or few days depending on the performance of the business. This is probably to much effort for one feature however, I think it would make a huge impact due to it being unique.