Traders on the floor of the New York Stock Exchange.

A glance at a chart seems to indicate that stocks are expensive. After dropping 4.3 percent from high to low, the is nearly back to record levels. And as bears delight in pointing out, the market has not suffered a 10 percent correction in more than two years. But according to one simple measure of market valuations, investors who buy stocks now are getting a much better bargain that those who bought earlier.

In 2014, "different than 2013, the move higher is driven primarily by an improving corporate outlook than a re-rating of market multiples," writes RBC chief U.S. market strategist Jonathan Golub in a Monday note. "In fact, forward P/Es [or price-to-earnings ratios] have actually contracted modestly, making stocks a more attractive purchase."