ZURICH (Reuters) - The Swiss National Bank on Thursday posted a first quarter profit of 58.8 billion Swiss francs ($64.34 billion), as the weakening franc and booming equity markets pushed the central bank to its highest ever quarterly profit.

The result compared with a profit of 24.2 billion francs a year earlier and beat forecasts from economists at UBS, who had expected a profit of 40 billion to 50 billion Swiss francs.

($1 = 0.9139 Swiss francs)

(Reporting by John Revill, Editing by Rachel More)