Earlier quoted context omitted.
Yes. The one bit you’re missing is that a call option is the right to buy a stock at a certain price typically on or before a certain date. To make the numbers simple, imagine a stock trades at $10/share. If someone came to you and said: how much would you be willing to pay to have an option to buy the stock for $100/share? The correct answer is: it depends. If it’s the right to buy the stock for $100/share at any po…
This is great, and as good a place as any for the thread to sprawl from, so I'll ask: it depends on how you know the stock is going to shoot up the next day, right? Trading on private information isn't illegal, and there's a huge variety of ways to acquire private information at varying levels of confidence, and in a sense the purpose of the markets is to aggregate everyone's private information to estimate a price.…
¯\_(ツ)_/¯
I think a lawyer would advise that that trade would come with a ton of risk. But the law isn’t clear. Generally, the SEC’s goal is to make sure markets are “fair.” What makes a market fair is hard to define.
If you do a ton of work to launch satellites to fly over Walmart parking lots and then model the correlation of how full they are to what the company’s next earnings will be: that seems like you worked hard and earned an edge you can trade on without getting in trouble. Feels like anyone has a theoretically equal opportunity to do the same work you did and get the same trading edge. That feels fair.
Your hypothetical feels less fair. Is it unfair? Maybe? So unfair that it’d be prosecuted? Probably depends on a number of things, including how much you made on the trade. At a minimum it’s an area of unsettled law. And you would almost certainly be in for serious scrutiny and a legal fight.
Supposedly one idea for Google’s business model early on was that they should use search query data to trade equities. After they researched it they concluded it would be considered insider trading. Though it’s hard to distinguish from overhearing something on the train, which (not legal advice) generally has not been. Think the difference at some level is scale and intention. And, I’d guess, if you made it your business to ride the Acela every day between Greenwich and NYC, bought special hearing aides that let you better eavesdrop on conversations, and made significant profits trading on the information then you’d be more likely to be successfully prosecuted.
But… how is that different from flying satellites over Walmart parking lots?
¯\_(ツ)_/¯
Sometimes the law is intentionally a bit unclear. Usually in areas like this where you care about a general concept of fairness and want some caution and buffer at the margins.