The sector is over valued and crowded. Time to apply The Zulu principle introduced by English Accountant. Can we justify their historically high PE ratios? Besides companies have lean period as well.They don't go straight up.If I'm correct currently Apple and Telsra have some issues. I can see weakening of share prices(one by one)and a decline in sales in the sector. I expect much bigger sell-off than now. I was thinking about buying Baidu around $100. It dropped below $94 unexpectedly. There is a chance of dropping it below $60 when tech sector becomes out of favour.