A long history of returns.

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 members of the S&P 500 have performed compared with the index itself.

Step on up, Clorox (NYSE: CLX).

Clorox shares have simply crushed the S&P 500 over the last three decades:

Clxsp

Source: S&P Capital IQ.

Since 1980, shares returned an average of 17.1% a year, compared with 11.1% a year for the S&P (both include dividends). That difference adds up fast. One thousand dollars invested in the S&P in 1980 would be worth $29,400 today. In Clorox, it'd be worth $158,400.

Dividends accounted for a lot of those gains. Compounded since 1980, dividends have made up 64% of Clorox's total returns. For the S&P, dividends account for 41.5% of total returns.

And now have a look at how Clorox's earnings compare with S&P 500 earnings:

Clx

Source: S&P Capital IQ.

Again, significant outperformance. Since 1995, Clorox's earnings per share have grown by an average of 8.4% a year, compared with 6% a year for the broader index. That's testament to the power of the company's brand, where most of its value lies. It also says a lot about how simple businesses like bleach often trounce "breakthrough" companies that investors chase.

Interestingly, that earnings-growth dynamic hasn't led to superior valuations. Clorox has traded for an average of 21.4 times earnings since 1980, compared with 21.3 times for the S&P.

Still, the company without a doubt has been an above-average performer historically.

The question is whether that can continue. That's where you come in. Our CAPS community currently ranks Clorox with a five-star rating (out of five). Do you disagree? Leave your thoughts in the comment section below, or add Clorox to My Watchlist.