If you make just one stock investment for 2011, what’s your best investment and where can you find it? I describe the best stock investment as one that offers both growth and dividend income while never having a bad year. Plus, it should be available to and affordable for all investors, even those who are new to the investment game. Here’s my pick for the best.Basically, the best stock investment for 2011 and going forward will take the form of a diversified equity mutual fund… for at least 90% of the American public. These funds manage a diversified portfolio of stocks (equities) for their investors, they charge for yearly expenses, and often they have a sales charge of about 5% that come off the top when you invest. If you pick the wrong one it’s far from being the best investment choice. Let me explain before I steer you to the best.There are thousands of equity funds to choose from and most of them have one or two undesirable characteristics that keep them off my “best stock investment” list: poor or inconsistent performance and/or a high cost of investing. Most equity funds try to beat the stock market as measured by the S&P 500 Index, and this can cost investors 2% a year or more for their management efforts – EVERY YEAR. Most of them actually perform worse than their benchmark, which is likely the S&P 500 stock index. Why pay for this kind of inconsistent performance every year on top of sales charges every time you invest money?Your best stock investment to buy and hold is a NO-LOAD S&P 500 INDEX FUND. Bad performance is not an issue and the cost of investing can be CHEAP. These funds merely track the S&P 500 index by owning all 500 of its stock components in the proper ratio. When you invest money here you are invested to share in the growth of the biggest and best corporations in the USA, plus earn about 2% in dividend income a year. If the stock market goes up your fund share price goes up in line with it. If the market falls your fund shares will fall in line with the market… no bad surprises.In the best stock investment a $10,000 investment will cost you zero to make because NO-LOAD means no sales charges. Your yearly expenses can be less than $20, which is simply deducted from your account each year. You will be invested in stocks like Apple, IBM, McDonald’s, Microsoft, GE, and Google. In the wrong funds you could pay $500 off the top to invest and as much as $200 a year for expenses; and you could lose money in a rising market.Above all else you want to invest with a reputable investment (mutual fund) company that offers good service to investors both large and small. You might assume that if you went with one of the best investment companies that that it would cost you a bundle. Not true. In fact, the best stock investment is available from the two biggest and best (in my opinion) in America: Vanguard and Fidelity. I’ve followed them and the industry since 1972. They are competitive and they work with millions of investors. What’s their secret, and how can they offer you the best stock investment so cheap?Index funds are cheap to manage because the fund company doesn’t need to pay investment managers to take their best guesses. Sales charges are only necessary if a fund company relies on outside parties (salesmen) to push their product. Bottom line: if you want the best stock investment at the best cost of investing you contact THEM and ask for information. In 2011 this is easily done on the internet. There are also toll-free numbers you can call for help in getting started, and anytime you need service as a customer.In other words, in 2011 you can hook up with one of the biggest and best investment companies in America and own the best stock investment… if you are willing to take the initiative. Otherwise, you “pays your money and you takes your chances”. I suggest you search for “no-load index funds” on the internet. That will lead you to Fidelity and Vanguard – where they offer the best stock investment in the universe in the form of an S&P 500 index fund.