Rio Grande Games Economic Board Game, Buy & Sell Shares, Ages 14+, 2-5 Players, 45-90 MinBLACK FRIDAY Try to gain as much gold as possible by dealing in shares before the huge stock market crash. Try to earn enough cash by cleverly buying and selling shares, so you can spend it on the coveted precious metal. If you are the best in manipulating the market development and share prices, you have the biggest chances to win the game. Black Friday offers an independently acting opponent, the M. I. B. S. (minimally intelligent broker service).