U.S. Treasury yields may be plumbing record lows, but don't look for the bottom yet, said Thomas Lee, managing partner at Fundstrat Global Advisors.
"It's hard to ignore that U.S. yields are a lot higher on an absolute basis than a lot of other countries which have less credit worthiness than the U.S.," Lee, who was also JPMorgan's chief equity strategist from 2007-2014, told CNBC's "Squawk Box" on Wednesday. "It's an argument for yields to continue to inch downwards," he said.
In the wake of the June 23 U.K. referendum vote to leave the European Union (EU), global sovereign bond yields have tumbled. Bond prices move inversely to yields.
Investors tend to buy bonds as a safe-haven play when risks rise. Jitters have surged amid a toxic brew of political chaos in the U.K., an uncertain election outcome in Australia and concerns over knock-on effects on the European continent, including wobbly Italian banks. Investors were also betting on major central banks either providing more stimulus or in case of the U.S. Federal Reserve, delaying plans to raise interest rates.
"There's always negative bubbles created when people get too worried," Lee said.
The benchmark 10-year U.S. Treasury yield fell as low as 1.357 percent on Tuesday, before touching 1.345 percent on Wednesday, marking fresh record lows. But that's still well above other highly rated sovereign bonds. The 10-year Japanese government bond saw its yield drop even deeper into negative territory, falling as low as negative 0.271 percent on Wednesday. The German 10-year bond yield fell as low as negative 0.19 percent.