Investing isn't easy. Even Warren Buffett counsels that most investors should invest in a low-cost index like the S&P 500. That way, "you'll be buying into a wonderful industry, which in effect is all of American industry," he says.

But there are, of course, companies whose long-term fortunes differ substantially from the index. In this series, we look at how individual stocks have performed against the broad S&P 500.

Step on up, Avon (NYSE:AVP).

Avon shares have slightly underperformed the S&P 500 over the past quarter-century, whacked by a recent fall:

Source: S&P Capital IQ.

Since 1987, shares have returned an average of 9.4% a year, compared with 9.7% a year for the S&P (both include dividends). That difference adds up fast. One thousand dollars invested in the S&P in 1987 would be worth $19,200 today. In Avon, it'd be worth $17,800.

Dividends accounted for a lot of those gains. Compounded since 1987, dividends have made up about half of Avon's total returns. For the S&P, dividends account for 39% of total returns.

Now have a look at how Avon earnings compare with S&P 500 earnings:

Source: S&P Capital IQ.

Pretty average here, too. Since 1995, Avon's earnings per share have grown by an average of 6.8% a year, compared with 6% a year for the broader index.

What's that meant for valuations? Avon has traded for an average of 23 times earnings since 1987 -- just below the 24 times earnings for the broader S&P 500. It's far different today, however. Avon currently trades for about 17 times next year's expected earnings.

Through it all, shares have been average performers over the past quarter-century.

Of course, the important question is whether that will continue. That's where you come in. Our CAPS community currently ranks Avon with a two-star rating (out of five). Care to disagree? Leave your thoughts in the comment section below, or add Avon to My Watchlist