Wall Street's bearish stance on U.S. Treasuries is not paying off.

SEC probes into the bond market were prompted in part by lopsided growth since 2008; the two largest firms now manage $3 trillion in bonds.

SEC said to be examining the way in which electronic bond-trading platforms give different prices to different clients, potentially hurting smaller investors.

Despite tensions in Ukraine, investors in ETFs are chasing yields on equities and lower-rated bonds.

After taking a beating last year, closed-end funds are offering the biggest discount since 2009, luring hedge fund investments.

Investment-grade volume on MarketAxess platform hit $44 billion in September.

Finra plans to disclose trading levels for privately sold corporate bonds on its Trace system.

Corporate bond yields averaged over the last four years 4.6%, vs. 6.14% in the five years prior to Lehman's demise.