system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] How did Tony Stark’s announcement that he is Iron Man affect the value of Stark Industries’ stock price?

Immediately following the announcement, did it rise or fall? What about when the truth about Obadiah Stane and his dealings came out? Was Sark Industries penalized by the government for that?
gpt
It probably spiked like a MF. Prior to 'I am Iron Man', SI stock was not doing well; between the terror scare and Stark's sudden announcement that they were out of the weapons game, a lot of uncertainty was created for both the short and long term. Then, in the immediate aftermath of the Iron Monger fight, before any details came out it would look like either a massive industrial accident or some sort of terror attack, which would further encourage people to dump their holdings. 

And then he says "I am Iron Man". Suddenly, not only does everything have a rational explanation, it also means that Stark Industries is sitting on top of the most game-changing weapons system of the 21st century and the biggest shift in power generation since the first nuke plant went live. At this point there's still uncertainty, but a *lot* of people are going to want in on the action, because even if Tony never sells a single IM suit, the underlying tech promises multiple revolutions in technology. And unlike a lot of revolutions that are only obvious in hindsight, this one is coming from a known element with the resources to firmly capitalize on their breakthrough.