NEW YORK - U.S. Democratic presidential candidate Michael Bloomberg on Tuesday outlined a sweeping financial services policy proposal to rein in Wall Street trading, boost consumer protections, increase Americans’ access to banking services, and crack down on financial crime. The left-leaning platform marks a striking turnaround for the former Republican New York mayor who made his $60 billion fortune in financial services and who in the past has criticized reforms introduced following the 2007-2009 financial crisis. Among the most eye-catching proposals is a tax of 0.1% on transactions in stocks, bonds and payments on derivative contracts, bolstering the “Volcker Rule”...