If I'm allowed I'm going to expand that topic a little. It's interesting and many seem to take part in it.
First of, I don't think it's a valid statement that years that end with 7 will generally be years of desaster regarding stocks, trades etc.
The resent drop is IMO, far away from the '97 crisis. It was a timely very restricted singular event and consolidation after a longer time of only rising stocks is not catastrophic or even unusual.
A thing that may come into play is ones again psychology. If the stocks are rising for some time, and all people
believe they will crash, they are very likely to sell. The pros know this and are going to sell by themselves. That will lead to falling bears, people think now it's coming and are also selling. Then it's going down. But because the recent drop in China had, to my knowledge, no signs of problems to the development of the chinese economy, it's not something that makes me afraid.
Next is the capital gain tax. We have something like this here.
If you buy and sell shares and make 512+ € profits in under one year, you have to pay a tax for it. The high depends on your overall income per year.
The idea is the following: If you are not taxed for it, this is a very good way to make fast mony. That makes the bears very importand. The management will therefore do everything to achieve succeses in the short term to make their own shares attractive on the market. That leads to decissions looking for short term high profits. Wich in turn my lead to dismissal to increase profits or to strategies wich may make the company bad suited in the long run, what can lead to dismissel as well.
So if the short term bears of the shares are not that importand, because it's not all that profitable to trade daily the management decissions may be forced to have the long run in mind.
And I think it was partly a problem in China. Rumors of the tax were the catalyst, but shares were overvalued anyway.
I think for 2009 there are plans to apply a general 25% tax on gains. (Plus 5,5% solidaritary contribution, these funds are to be used for economic aid of the east german regions.)
Not totally stupid IMO, since making money with money is somewhat strange, especially if you have to pay taxes on your income anyway.
Only problem maybe that more and more people use shares for their old-age provisions. And in these cases, if they are not regularly traded for short term profit, it shouldn't be taxed.
But these are only personal thoughts based on mainly national observations.