This the "David Rosenberg" symdrome. The idea that short-term economic news should matter anything at all to the stock market. Here is a fun way to disprove this with numbers
Damodaran has an spreadsheet that values the stock based on analysts estimates for the next 5 years and then calculates an terminal value for the market. The whole method is based on the Dividend Discount Model, the idea that a stream of dividends is worth the value of those dividends (say $10 per share) divided by a discount rate minus the growth rate of those dividends
Example:
$10/6%-4%
10/0.06-0.04 = 500
The Dividend Discount Model is essentially that terminal value. Damodaran added figures for the next few years to make the calculation more accurate (instead of having a fixed growth rate for the whole calculation) and then he adds that terminal value.
But whats interesting is that the forecast for the next 5 years matter little to the final intrinsic value of the market. Usually its only around 20% of the figure. You change the forecast and the intrinsic value for the market doesn't change all that much. There is SOME effect but its unlikely to change someone's decision from buy to sell, etc
What this means in english is that the vast majority of the value stock market is derived, not from little changes in the forecast for the next 5 years but from the actual valuation level of the market (the terminal value of the market), what Damodaran calls the Equity Risk Premium and what I would call the Expected Value of the market.
This bears repeating, the vast majority of the value of a stock market comes from that terminal value, not little changes in forecasted earnings for next year or even 5 years.
What's interesting is that Rosenberg is pretty terrible at valuation as well, he is a huge fan of the Shiller PE, which has serious flaws, especially in times like right now (during earnings booms at 'high valuations', I wrote about that in the past).
Damodaran ERP right now is around 7%, my expected value (which I right now I would favor deriving from the forward PE, again, due to the earnings boom) would be around 6% or so. So this market is on the richer side but I believe its far from this bubble that the Shiller cultists seem to think