Greece is going to default on its debt obligations in the next 30 days because Europe is "fed up," the often-contrarian investor Mark Grant said Thursday.
The managing director at Southwest Securities spoke on CNBC's "Squawk Box" after Greek banks got a boost from German Chancellor Angela Merkel. Merkel said Greece has told European partners it's committed to intense discussions with creditors to solve all open issues and avoid a looming default at the end of the month.
"I'm in the minority view, but what else is new?" Grant said.
He said it's not clear whether Greece will exit the euro zone.
RBC Capital chief market strategist Jonathan Golub said there's a "clear belief" among institutional investors he's spoken to that Greece will get the emergency funding to pay the bills.
"As an equity guy, the question is, 'How much do we care at this point and time?'" Golub said.
Based on Wednesday's powerful move higher in stocks, the answer may be not much. "We're hovering around all time highs ... and we're complaining that the world is coming to an end. Things don't look so bad for equities," he said.
At the same time, the 10-year Treasury yield hit an eight-month high Wednesday, just shy of 2.50 percent.
Grant said he's not predicting lower U.S. bond yields anymore because of the "serious problem" with Greece and a directive from the European Central Bank.
"My thesis is we're living in wonderland," he said. "Wonderland is a place that's controlled by the central banks of the world."
Worried about Greece, the ECB told all the central banks in Europe to get liquid, he said—resulting in the sale of German and U.S. government bonds, which pushed yields inversely higher.
Grant also noted as evidence of central bank control the ECB's quantitative easing bond buying, and what he calls the Federal Reserve's refusal to sell assets on its $4.5 trillion balance sheet.