In fact, Keith, I believe the whole idea of shares should be examined. Shares should not be object of speculation.
The idea should be: you buy shares, and receive a dividend on the company's profit in accordance with your amount of shares. When you sell them, you get a set price for them.
The banks should not be dealing in shares, they are probably the ones who cause wild fluctuations on the share markets.
The whole system of banking needs to be revised from the foundations, with a drastic shake-up at the top. The banking system as we know it now by all rights died its natural death in 2008 after long and agonising suffering.
What we see now are just nerve-reactions of a dead monster called the banking system that had hundreds of billions of tax-payers money pumped into it, or rather, printed money that popped out of a press machine..
Those places like Wall Street, where crowds of shouting men stand about sticking fingers up ad a digital screen, making twists with their hand and facial expressions... will all pass away soon.
Speculation is running its final lap.