Added "stocks can change"

digital-garden/finance/everything-can-change.mdx

@@ -31,6 +31,13 @@ This change in name was accompanied by this list of impacts (values as of March
 - Top 3 holdings had a weight of 53.24% in the new index against 22.52% in the previous (x2.4)
 - Increased fees from 0.23%/year to 0.30%/year.
 
+## Stocks can change
+
+Multiple reasons exists for stocks to be altered, usually through:
+- Mergers: when 2 companies agree to become one, shareholders of both entities usually receive stocks of the combined entity.
+- Acquisitions: when one company acquires another one, shareholders in the acquired company usually get stocks of the acquiring entity, receive cash, or a mix of stocks and cash.
+- Privatization: when an investor decides to buy the majority of its shares and removes the company from the stock exchange (inverse of an IPO).
+
 ## Dividends can change
 
 Some investors focus on dividend-growing companies, the ones pushing the streak beyond 25 years join the club of the "Dividend Aristocrats".