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    Why don't Inverse ETFs Evaporate?

    For funds like SDS and SQQQ, which track the inverse of an asset that usually goes up, it would appear that they would eventually: - Go towards a share price of $0, in which case the fund would shut down - Do enough reverse splits that liquidity would eventually run out due to so few tradeable...
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    What keeps Close-ended-funds NAV in line with the share price?

    Without the presence of authorized participants arbing the price between NAV and the price, how can CEFs have value? It seems like they would be always off from their true value.
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    Are these two PHP functions equivalent?

    If your title is dynamic, you should also escape the HTML in it, to avoid cross site scripting attacks.
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    Questions on Counterparty Risk with Trade / Settlement

    Coming back to this, it took a while for this to sink in. For the future: the Clearinghouse for the trade becomes the counterparty for both sides of the trade.
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    Valuing Non-marketable Options

    I didn't know they were required to provide this. That said, I would still prefer to do my own calculations (Trust but Verify). The company has mentioned that they typically lose money on the options they write (and thus I gain it), but again, going on their word. From my reading of their...
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    Valuing Non-marketable Options

    My employer gives me the choice to put some of my salary into the company option plan. The options they grant are 10 year, ATM options, which cannot be bought or sold outside. The only way to exit the position is either to exercise, or sell back to the company for the intrinsic value...
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    If you had only 1 hour to look at a financial statement, what would you glance at?

    Biggest thing for me: start reading from the bottom of 10-Q and work up. All the stuff they want you to see is at the top.
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    Customizing the sample Python IBAPI code provided in the testbed

    You might get better answers on Stack Overflow, since your question is more programming related than trading.
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    SP500 return vs top 10 companies in sp500 returns

    If the idea is that the larger companies are more profitable, there are SP100 products (e.g. OEX) that you can trade. From what I recall they don't do as well as the SP500.
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    confusing chart

    Wow, that is exactly the path I am going down. I've been addicted to economics youtube videos and political news. I guess I know that it won't pay out, even if it is interesting.
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    Assignment in a Vertical Spread

    In my case I had 5 QQQ spreads at 10 point spreads. Executing the long calls would have a drastic effect on my buying power, since I would need around $135K to follow through. This is pretty counter intuitive, but makes sense. I guess it means if the time-premium is ever lower than the...
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    Assignment in a Vertical Spread

    If I have a long, ITM, call vertical spread, there is a risk the short leg could be assigned. This seems unlikely if the leg is deeply ITM, but suppose that it was close to ATM. In my case, the options have 14 DTE, and I am approaching the ex-div date. If the short leg gets assigned...
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    How do you guys think the TSLA inclusion will play out?

    The spreads are huge. A 10 strike call spread was $10.10 when I checked yesterday. It's hard to get in.
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    How do you guys think the TSLA inclusion will play out?

    Does this mean the larger constituents of the index are going to drop Friday afternoon? Or is it priced in some how?
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    User-defined Indexes / with performance tracking

    If you actually want to invest in one of the indexes there are sites that let you build your own. Again, not sure if they support non-US stocks, but I know someone who used (and likes) Motif Investing.
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    Stock Splits while Short

    In my portfolio, what would that look like? It sounds like it would appear as a buy to close with the broker closing on my behalf?
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    Stock Splits while Short

    If I short sell a stock, and the company goes through a reverse split (say 1 for 5), what happens to the share I have short? A regular split is easy, since any number of starting shares can be multiplied into the split shares. Also, a reverse split makes sense if you are long, they can give...
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    Internet speed test ...

    Keep in mind that the speed test will measure from your laptop to some server that hosts the speed test, and that ISPs will prioritize speed test traffic. The speed test you take will give the upper bound on how fast your connection could be, but it won't translate to the site you intend to...
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    Why is the margin requirement higher for Call - Put?

    I have an ulterior motive in asking these questions: I am implementing a toy brokerage program. This is why I am asking questions about the margin enforcement. Framing these questions as if we were the broker, how could we explain to someone else why the margin requirements? e.g. "Hey...
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    Historical Option data?

    Not to bring this thread off topic too much, but I wanted to explore LEAPS strategies, which need a lot of history. I agree the farther back the data the less useful it is, but I want to test against the DotCom crash. I also wanted to test converting LEAPS into calendars by selling weeklies or...
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