March 13 (Reuters) - Euro zone government bond yields tumbled on Monday as the collapse of Silicon Valley Bank (SVB) sent investors rushing into safe-haven assets and caused traders to bet on a smaller rate hike from the European Central Bank (ECB) on Thursday. SVB's collapse sparked a massive rally in European and global bond markets on Monday. The German 2-year bond yield was last down 34 basis points (bps) at 2.746%, on track for its biggest one-day drop since 1995. Market pricing showed traders thought a 25 bp hike is now the more likely outcome, despite 50 bps appearing almost certain last week. The European Central Bank is not planning an emergency meeting of its banking supervisory board on Monday after the collapse of SVB, a senior source told Reuters.

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