Not really a bursted bubble yet for stocks, simply a correction. Not even a bear market yet (defined as a drop of 20% from recent highs).

Yesterday introduced a lot of uncertainty to the market, hence the flight to safety. Jerome Powell was sworn in as the new Fed chairman just as it appears infaltion could be heating up...and oh yeah, Janet Yellen on her way out offhandedly mentioned that she thought stock valuations were excessive.

A common adage: "Bull markets don’t die of old age, but rather they’re killed by the Federal Reserve."