Demand & Supply- two words which explain almost eveything!

Demand & supply:
The most important words in economics which explain the irrational rise in price of assets, commodities etc. – the rise in price of crude oil from $10/ barrel in 2000 to $147 / barrel in 2008 – is partly due to increased demand. Even the irrational increase in equity prices in bull market is a case of demand being much more than the supply of shares- the buyers outnumber the sellers -a classic sellers market and hence weeds get sold as flowers2006-2007. And in the bear market, it is the vice versa- the sellers outnumber the buyers and hence the supply of shares is much more than the demand. The result- dramatic fall in prices. A classic buyers market- and hence flowers are being sold at the prices of weeds as in 2008.