sometimes the whole mkt and many individual stocks follow the patten the year before last year. for example,
1.naz made Top in Mid/ Jan/2004 and big bottom in august/2004(1750), made top in mid/2006 and more likely it made a bottom this months too(2010)
2. mkt had jan effect in both 2004 and 2006, big drop in Jan 2005
3. many 2004's best stocks became the worst in 2005, and become the leader in 2006 again, such as gm, osip, siwr, osip, bcsi...