Ask any seasoned investor what the most critical aspect of a sound stock investment would be and he’s most likely to say: price. But a look at the rally in the handful of bluechips in recent months suggests that the logic behind this theory has been thrown to the wind. The run-up in these 15-20 stocks — termed as ‘quality’ by market participants because of better earnings prospects even in challenging times — to giddy levels has some ............ET