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I have never used LightSpeed, but, in general, yes, that can happen. The market can move before you press "send", there can be hidden orders better than the national best bid/offer (NBBO), and your broker may even try to direct your order to exchanges that have a good history having more such...

Why not just sell a put?

There are exchange traded products for Vix contracts a few months from expiring: VXZ (positive volatility) and ZIV (inverse volatility). If you're using Interactive Brokers, beware that their VIX contract margin requirements are insanely high right now, at least insane if you're going long...

I apologize in advance if this message is a bit too basic for people who already trade options. You could buy puts and sell calls (at the same strike and expiration in its simplest form) to create a "synthetic short." Options also have the psychologically convenient feature of taking you out...

I notice on a another thread here that Tastyworks is supposed to launch and announce prices tomorrow (January 3, 2017). I'm not expecting them to have record low prices, you might as well check. I believe that, even though options on Untied States exchanges are subject to National Best Bid...

I think that Bitcoin and some similar e-currencies have value because some participants are willing to pay for privacy. Those privacy seeking participants have less ability to exchange Bitcoin for conventional currencies (due to identification requirements or perhaps other local laws), so they...

Any instrument can be overpriced and almost any can be underpriced. If you believe that the difference between your opinions and that of the average market participant is that you think the market will go down if Clinton is elected, while the average market participant thinks the market will...

Years ago, I tried deltaneutral.com and eoddata.com. I think that one of them stopped providing bid-ask data for options, which made the data nearly worthless. I don't know what the situations are with them now.

You do not know that each option's price is exactly half way between its bid and ask, although you do know that it is somewhere within that range. If the price of the underlying is $85.54, the 85 call is $0.54 in the money, so its premium (based on subtracting $0.54 from your bid and ask...

I think I need to retract my previous message. I'm not sure that it's all wrong, but I'm no longer confident in what I wrote, because, checking DWTI (negative 3X OIL ETF), I see the following movement from 2015-12-04 to yesterday's close: DWTI: $148.50 --> $57.71 (down 61.1%) The speed of...

GloriaBrown, comparing to the OIL ETF, it appears to me that only about a fifth of of UWTI's loss can be attributed to "volatility drag" leverage rebalancing effects (as discussed in the paper I linked to in my March 9th, 2016 posting in this thread). The bulk of the loss was, I suspect, due to...

I imagine that many of us want to participate in the market volatility triggered by the British European Union exit vote. I think it would help many of us if anyone who is feeling charitable and knows about such things could provide some quick guidance, ideally with references, about the rules...

I think there would probably be more of a market for and less early exercise of very deep in the money options if the margin rule for a simple long option position were changed from... 100% of the value of the option (at least that is my understanding of how it is in the United States) ...to...

That is interesting. I didn't realize that Yahoo showed only monthly options for ^VIX. I don't know if there is a completely free open online source for weekly VIX index option prices, and I assume you have already done the obvious web searches for that. So, I'll just mention a few brokerages...

Reposting my message from http://www.elitetrader.com/et/index.php?threads/my-personal-experience-shows-3x-etf-is-not-a-fair-game.298324/page-2#post-4256336 : I don't fully understand the math, but I recommend checking out pages 1-11 of Jian Zhang's 2010 PhD thesis, "Path-Dependence Properties...

I don't fully understand the math, but I recommend checking out pages 1-11 of Jian Zhang's 2010 PhD thesis, "Path-Dependence Properties of Leveraged Exchange-Traded Funds: Compounding, Volatility and Option Pricing" at https://www.math.nyu.edu/faculty/avellane/thesis_Zhang.pdf , especially...

Wow. Congratulations on actually trading these things (which I have yet to do) and especially for being profitable. Although you now officially have more experience that I do, I feel compelled to mention three more things that I recall reading on this topic, just because I'd feel a bit guilty...

If you were to trade the bonds in such a situation, I would think you would still want to have some estimation of what the holders of that particular type of bond would receive if the bankruptcy does happen. In situations where you think that is zero and you're just betting that the bankruptcy...

Another resource I'd like to mention is http://finra-markets.morningstar.com/BondCenter/Default.jsp , which lets you search for bonds by company name or stock symbol and will show you the last reported trade price, although I believe that reporting the trades to that site is completely optional...

I have found the older blog postings at http://www.distressed-debt-investing.com quite educational.