You may want to have a couple of technology stocks, one or two healthcare stocks, then one each invested in banking, manufacturing, retail, and other sectors. For that reason, the best investment brokers on all counts are likely to be Charles Schwab and Fidelity. Not only do fractional shares enable you to buy stocks for less than full price, but you can also use it to create a portfolio with fractions of many different stocks. As your portfolio grows, you may also want to add some bonds to the mix. This performs the same function in case it is not offered by your employer. Most employers offer either a k or b plan, and many will match part of your contributions. When done correctly, and safely, you can earn a lot of money when compared to other investments over a similar period.