$Microsoft (MSFT.US)$ how will the stock affected by the regulatory tightening in China?

$PayPal (PYPL.US)$ $Meta Platforms (FB.US)$ $Microsoft (MSFT.US)$ Seeing the price of PayPal drop so heavily just on rumours they are buying Pinterest has really:
Made me want to buy some PayPal
Made me think…
Do acquisitions and rumours of such always result in a drop for the larger company? Did this happen when Facebook acquired WhatsApp/Instagram? Or what Microsoft bought LinkedIn? Or is it purely because big money thinks they are overpaying?

Typically, a beat in earnings will drive a stock price up after the market opens. But realistically, it's not uncommon to see a stock's price fall after beating earnings.
An interesting case to study is the brilliant Q2 and Q3 (2021) earnings results from  $Apple (AAPL.US)$. The superb earnings were not as well-received by investors. Despite the strong quarterly results $Apple (AAPL.US)$shares fell.
If you are an  $Apple (AAPL.US)$ investor who wondered after a remarkable Q2 and Q3 earnings report, why the value of your stock was going down rather than up…
The possible reasons -
Warning that chip supply constraints could impact iPhones and iPads will weigh on the short-term outlook.
Earnings may not seem good enough for an investor looking at every short-term opportunity to move funds to where the next quick buck is likely to be.
Earnings were not as high as anticipated.
Speculators already drove up the price in the days before the earnings report and then sold just before the report was released
Stock markets are not always
rational.
Long-term investors (like myself), shouldn’t be too worried at all. $Apple (AAPL.US)$’s core businesses remain strong, it’s brand inspires fierce loyalty, and it has plenty of cash to fund its future expansion plans beyond the iPhones and iPads.
Surprisingly enough, share prices do dip after robust earnings release. Sometimes the expectation of beating earnings is already priced into the stock. The expectations of beating earnings was already “baked in.” If you look deeper, there might be some negative news that trumps the earnings beat. Or perhaps, the whole market dropped and the company was taken down with it.
There is no rule that the stock must immediately reflect the optimism or pessimism of quarterly results in the price. Fundamentals like profits, sales and everything else align with price only in the long term. In the short term, nothing is predictable or rational.
A strategy you might consider (carefully), if this is happening too consistently. To sell those stocks prior to the earnings release, then re-invest the principal and gains back into the market. You can usually find a way to hold cash in the stock market for a short period of time, if you invest through a fund.
Honestly, in the long run, these quarterly results don’t matter too much. The long-term success of the company is not determined by short-term graphs and charts.
Now, let’s anticipate eagerly for  $Apple (AAPL.US)$ to announce Q4 earnings on 28 October 2021.
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