Its not always noise.
I think a lot of the run-up was on the expectation of a business friendly atmosphere by Team Trump - and they have largely delivered. If I had to guess, I'd say that the Trumpenomics team really underappreciated the effect of a tax-cut stimulus on a full-employment economy that was chugging along just fine without the stimulus. Inflation has been in the back of the minds of many investors - for years. But, it took the tax-cut stimulus to crystalize - and so part of what we see is a direct reaction to that.
And, I think some investors are beginning to price-in the effect of a Dem-wave in the fall. If you think DC is chaotic now - wait for a Dem controlled house - Trump will be neutered. The gravy train will be ground to a halt - in terms of free-rein to Wall Street, as gridlock and investigations take over.
So, add it together, correction, inflation worries, and change in political winds - its time to settle in for a long-haul, and cash in the gains from the long-run-up.
I don't see this anywhere near the concerns of 2008. But, as interest rates rise - it won't be as far away as people want it to be. Credit Card, mortgage, and car loan defaults will rise...