The Law of Supply and Demand as said in the 14th Century

"If desire for goods increases while its availability decreases, its price rises. On the other hand, if availability of the good increases and the desire for it decreases, the price comes down."—Ibn Taymiyyah, 13^th-14^th-century Mamluk scholar

Here's how we show this principle in the 21st Century....

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Investors, Traders and Entrepreneurs.