(Image credit: Getty Images) Fidelity Investments has built one of the most extensive mutual fund platforms in the industry. As of April 30, its online screener lists more than 300 mutual funds. For many investors, especially those with a workplace 401(k), Fidelity mutual funds are already familiar. Many of these have no minimum investment requirements and no transaction fees when traded on Fidelity's brokerage platform. The lineup covers virtually every asset class, including stocks , bonds , commodities and money markets , with a large share of actively managed strategies That said, the firm has also made significant progress in exchange-traded funds (ETFs), which Fidelity's screener now shows just over 80 options. Like its mutual fund lineup, the ETF offering spans a wide range of asset classes, including newer additions such as bitcoin and ethereum. From just $107.88 $24.99 for Kiplinger Personal Finance Become a smarter, better informed investor.…