First, when there is no "e," price does not matter. Many of the tech stocks in the SPX in 1999 did not have any earnings and never had a chance to produce earnings because many of them went out of business. However – and I've been saying this for quite some time and I'm finally seeing a few others make the same assertion – if you adjust the current earnings of the companies in SPX using the GAAP accounting standards in force in 1999, the current earnings in aggregate would likely be cut at least in half. And thus, the current p/e ratio expressed in 1999 earnings terms likely would be at least as high as the p/e ratio in 1999, if not higher. (Changes to GAAP have made it easier for companies to create non-cash earnings, reclassify and capitalize expenses, stretch out depreciation and pension funding costs, etc).

We talk about the tech bubble that fomented in the late 1990's that resulted in an 85% (roughly) decline on the NASDAQ. Currently the five highest valued stocks by market cap are tech stocks: AAPL, GOOG, MSFT, AMZN and FB. Combined, these five stocks make-up nearly 10% of the total value of the entire stock market.