Wall Street is battling over whether scorching-hot tech stocks are too expensive

Are tech stocks overvalued? Depends on who you ask — and what metric you use.
On one hand, the price-to-earnings ratio (P/E), the most traditional measure of valuation, remains low relative to both history for the tech sector and the broader S&P 500.
On the other, the ratio of tech enterprise value to sales is the highest since the dotcom bubble when compared to the benchmark. Not to mention that the tech trade is more crowded with large fund managers than at any point since the s