If you are a serious long-term investor you are no doubt delighted to bid 2015 adieu. Last year was without question a year that favored speculators, traders, and rank amateurs. The big-cap U.S indices managed to eke out positive total returns for the year, but it was a handful of stocks (many of the most speculative variety) that carried the market. The average U.S. stock was down more than 4% last year. Take away Amazon, Netflix, Google, and Facebook and the S&P 500 would have finished in the red.

The misery was widespread. The only U.S. equity mutual fund strategy that delivered positive returns in 2015 was large-cap growth. The average mutual fund following Morningstarโ€™s remaining eight strategies lost money last year with small-cap value shares (the multi-decade winner) losing the most (-6.7%).

For conservative investors and investors focused on income, the news gets even more frustrating. According to Bespoke Investments, the average return of the 74 stocks in the S&P 500 that didnโ€™t pay a dividend at the beginning of 2014 delivered an average return of almost 4%. The average return of dividend paying stocks in the index was -5.15%.

If the dividend record is an indicator of quality as Benjamin Graham advised, then it would seem that the higher the quality and the greater the investment merits of a stock, the lower the return in 2015.

Every dog has its day sounds appropriate, but donโ€™t forget what your mother told you,ย when you lay down with dogs you get up with fleas.

Donโ€™t get fleas.

If your stock portfolio was down in 2015, you should view it as a badge of honor. High-quality businesses with durable competitive advantages and admirable dividend records had an off year. Thatโ€™s no reason to abandon a winning strategy. Stick with quality and dividends and you stick with long-term investment success.