Record E-Trading Brings More Liquidity to Corporate Bond Market

Electronic trading of corporate bonds has reached record levels, as credit-trading algorithms get smarter, grab market share, and make it easier for investors to buy and sell corporate bonds without affecting prices too much.

Banks, money managers and others on average traded $15 billion of company bonds electronically daily in September, according to a report from Coalition Greenwich, looking at both investment-grade and high-yield debt. That record level compares with a $12.7 billion daily average in 2021. For junk bonds, about a third of trading volume was through online platforms last month, up from about a quarter in the same period last year.

The growth of online trading has helped liquidity in the corporate bond market at a time when central banks are lifting rates, a situation that many investors have long feared would make trading all but impossible. A key measure of liquidity, namely the average difference between the price a dealer will pay to buy or to sell a security, is around 0.06 percentage point now. That’s in line with levels in 2018 and 2019, when interest rates were more stable.

“Absolutely I think the liquidity of investment-grade bonds relative to other asset classes has gone up this year,” said Travis King, head of US investment-grade corporates at Voya Investment Management, adding that electronic trading is part of the reason why.

Part of that is because of increasingly sophisticated algorithms that can price a growing list of securities without human input. Algorithms are helping with electronically-assisted portfolio trading, where investors can buy or sell large numbers of bonds in one fell swoop, aided by dealers who need to package bonds into exchange traded-fund shares or break ETFs down. King said these trades are a key support for liquidity.