Gottfried, if it weren't so much work I'd love to follow some quantitative measures over time, like the price/book value of some key stocks such as INTC, TXN, STM, AMAT, KLAC, NVLS, etc, and price/sales ratios, PER's and such. Got all that, but not updated for a long time.
This could be key, remember the summer of 1998, stocks had taken quite a bath already. Then the rebound came later as expected, whoops, another 20 - 30 % gone. Like the BtB here, just another one or two months to the downside were all that was needed:
Market Data 
Markets 
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