Stock Exchange

* See also Rapture_Economy
* See also Crash
* See also Money_In_Rapture
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A Rapture "Stock Exchange" ? ( It Aint No Wall Street ) :
Would it even exist ? Or if it did, was it anything that would 'Crash'. 
The issue with "The Great Market Crash of 1929" was that banks were lending money with little security to people investing in the Market. Would there be Banks in Rapture willing to do it that way, even if the 'Lendees' still hadn't learned the lesson from that historic mess ? (In the 1920s, the American Stock Market was assumed a "sure thing" for investing, with a constant upward spiral as money from good times speculation kept adding into it year after year. Ordinary people across the country invested in the market. ). 
In the '29 Crash, national financiers had multi-layered shell companies which they borrowed against to buy more stocks. When the market started to drop, there was no value to recover. In Rapture, no such massive scale ( large companies and byzantine financing ) could exist to allow such dishonest practices and the same kind of collapse. 
Could there possibly be the rampant overproduction in Rapture ( as was the case eventually in the 1920s which when that other market 'Crashed' -- Which made sure there was little of value to recover from the companies when their credit dried up.) ?? Most-Likely Rapture would NOT have many massive industries/businesses ( the biggest were probably the AE and the City's Maintenance Department, Utility Companies, and some food businesses ). Without huge magnitudes of Stocks of large companies existing nothing like the same 'Crash' could occur.
Rapture was too small a place for it to impact the economy the same way. The majority of businesses were small ones ( most without "Stocks" issued ). But in this game, vast illogical assumptions ( using Real World allusions and CLICHES ) were made to facilitate the 'Fail' -- including so much that really wouldn't exist in Rapture.
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Was There Even A "Stock Market" in Rapture ? :
No reference to it ('Crashing' or otherwise) or a 'Stock Exchange' is found ( Rapture's population is a bit small to need one or to support one ).
Note - After the Kashmir Incident, the whole city was thrown into Chaos and Normalcy pretty much ended as the economy and normal life shifted into survival mode. ( A "bank run" happening then makes little sense when Money no longer has any value. 
Bank Crash -- Yes likely during that earlier 'Depression' in Raptures economy, with Rapture's limited money supply ( low confidence and much caution to give any credit loans ). Ryan is loath to simply 'print' money to attempt to fix an economics problem. Most of what happened in 1929 was reliance of many companies constantly borrowing money, and the market in credit had 'dried up'. AT the same time, sales of products fell at a time when there was industrial and manufacturing overproduction, and very many companies had to lay off their workers. Bankruptcies then were rife when the previous loans came due.
Ryan talks : "While I was buying buildings and fish futures, he was cornering the market on genotypes and nucleotide sequences ..." in Audio Diary "Fontaine_Must_Go". But that's not 'Stock Market" - which so many people could easily invest in ( as happened in the 1929 Crash ). "Genotypes and Nucleotide sequences" ??? Sounds very 'buzz wordy' by the game writers. WE don't even have that TODAY. Nearest thing is patenting of certain Genetic Engineering mechanisms.
"Joint Stock Company" - where investors can buy-in to a company for a 'share' ( a way to spread the risk, rather than have only a few owners ) would be more likely mechanism for old Rapture ( besides the more basic direct loans from banks/individuals ). Stock Exchanges originally grew out of Joint Stock Companies. Of course, the owners of those 'shares' may also ( as they did in the old days ) be called on to provide additional capital for the business venture (an 'Assessment') or lose their sharehttps://computertricks.net/assessable-capital-stock-definition/.
Reed Wahl in Minervas Den DLC makes a reference to 'stock market' ( in his plan to be able to predict everything ), but it might not be Rapture he is talking about - but in The Surface World.
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