Alphabet (NASDAQ: GOOG) (NASDAQ: GOOGL) and Amazon (NASDAQ: AMZN) look cheaper than the S&P 500(SNPINDEX: ^GSPC) at face value. Right now, Alphabet and Amazon trade for 17 and 20.9 times earnings, respectively. The S&P 500(SNPINDEX: ^GSPC) trades for 24.2 times earnings, making these two far cheaper than the broader market.