The London Stock Exchange's new electronic Order book for Retail Bonds has gone live with companies including Tesco and BT taking part.
The FTSE recovered some of last week's losses in early trading, rising 37.28 points (0.7%) to 5,098.20 with gains from miners and banks.
One in seven IFAs intends to leave the industry as a result of the RDR, research by J.P. Morgan Asset Management suggests.
The FTSE was marginally down by 0.04% to 5186.60, despite strong gains by utilities in early trading.
Lyxor global head of ETFs Daniel Draper has left the company.
The FTSE climbed 0.72% in early trading to 5255.18 bolstered by strong performances from big names.
Early gains among financials and miners helped boost the FTSE up 27.43 points (0.50%) to 5482.80 in early trading.
Strong Christmas sales at Tesco helped keep the FTSE in the black with a slight rise of 0.02% to 5,539.38 in early trading.
Manchester United is to raise £500m through a bond issue in a bid to pay off its debts.
Syndicate Asset Management has completed the merger of its wealth management subsidiaries to form Ashcourt Rowan.