Fidelity Investments has launched six new exchange-traded funds (ETFs) and reduced management fees on almost a third of its total ETF lineup. This move is expected to kick off another strong week for ETF debuts, with at least a dozen new products expected to be launched. Among them, Ark Invest and 21Shares AG will roll out a group of five actively-managed ETFs tied to bitcoin and ethereum futures as well as blockchain technology on Tuesday and Wednesday. Fidelity's ETF conversions include funds focused on large-cap growth, value and core portfolios, as well as mid-cap small-cap, and international stocks, offering fees of 18 basis points to 28 basis points.