Spanish Prime Minister Mariano Rajoy has tried to play down fears the country would need an international bailout.
After a dismal week that saw the country's borrowing costs soar, Mr Rajoy said he was sending a "message of calm".
Doubts about Spain's solvency rocked global markets and saw the interest rate on 10-year government bonds hit a record 5.48 percentage points on Friday.
Spanish markets slumped to lows not seen since April 2003.
Speaking at an economic forum in Sitges in eastern Spain, Mr Rajoy insisted the country "will get through the storm through its own efforts" and with the support of our European partners.
Mr Rajoy's message echoes similar messages from the Spanish budget minister and other officials told reporters on Friday that the government was confident of the country's solvency.
However, German news weekly Der Spiegel, citing unidentified sources, reported that Chancellor Angela Merkel had expressed doubts that Spain has the resources to cope with its crisis and urged the country to make use of European rescue funds to recapitalise its ailing banks.
Spain is the eurozone's fourth-largest economy and has been battered by a crash in the property market and record unemployment of about 25%.
Plunging housing values saw private and banking assets drop and eradicated a source of plentiful income for the Spanish regions.
Spanish bank Bankia has asked the state for €19bn to repair its books, in addition to €4.5bn already injected, the biggest rescue in Spanish banking history.
But Mr Rajoy said "I have no doubts about the vast majority of financial institutions in Spain".