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I'm going to assume, if this wasn't clarified already, that they mean whether it was at the bid or the ask. If so, I could see using the liquidity-taker as being a more active way to define whether a transaction was a "buy" or a "sell."

I don't think this question makes sense; technical and fundamental factors both exist, and you should consider them both all the time. There's no way to quantify them.

You have to be able to compare two different systems to define profitability, so it has to be a proportional measurement. Fixed amounts or rates don't make sense for measuring. I also think it has to take into account drawdowns and volatility. Sharpe is a simple way to evaluate performance...

Yes.

Volatility Changes over time. The bet on the difference in decay rate. Specific events, time of year for specific commodities, you get it. http://www.theoptionsguide.com/calendar-spread.aspx

Why do HFTs even go thru IEX? Is it because they have to, having been routed from another exchange to get NBBO?

For anybody who doesn't actually know what the fuss is about here with the vets chuckling at this guy, VIX is quite peculiar because it is not traded on its index directly. All options and ETFs are derived from VIX futures. It doesn't matter what the VIX is now, it matters what the forward...

Heard about that, something about the producers of the Apprentice having all the unaired footage. I think the official stance is that they didn't want the legal collateral damage as well as the possibility that the material actually helps Trump.

¯\_(ツ)_/¯ Trading ain't cheap!

Robinhood offers completely free trading, but they're extremely slim on functions and services. 100$ a month doesn't seem that farfetched. On IB, a roundtrip lot is 1$.

A DITM call has a delta of 1, meaning its value changes identically to 100 shares of the underlying. So, you could short 100 shares, and your gain would be locked in until expiration, no matter what the stock did; everything your call gains or loses is cancelled out by the short stock. You...

You can go flat by trading against the delta by buying/selling options that have the same expiry. What's nice about this is that you also get some flexibility; if the trade looks like it might actually continue, you may still be in the trade.

I know they don't get a do over, that was my point. What happens to the kids who still have to use the public school?

If the competition told them they were inefficient in any other industry, it's easy enough for the customer to go and get another product. The education industry is not like that; not everybody has the privilege or options of being able to relocate themselves and their children. While I'd...

This premise is interesting; isn't it the opposite ideology that convinces us we should tax businesses less, as opposed to telling them to simply become more efficient? Obviously the lack thereof of competition is a big factor, but it's something to note. There's no telling where lack of...

Indeed, how do you solve spending inefficiencies in markets without competition? I'd say it takes money to even figure out how to more efficiently spend money. Consulting, auditing, ugh.

I mean, absolutely improving the quality of public education is necessary. This will entail money, better standards, and dealing with the unions. But, Betsy Devos wants to downsize public and increase privatization. Perhaps good for those well enough to get the actually good schools, but...

As with IEX, and then Chicago adding its own speedbump, and NASDAQ mentioning the idea of older orders being given some special priority over others, "extended price orders", it seems like everybody is looking to offer incentives to those put off by HFTs, frontrunning, and spoofing. Whether...

I've always thought of it as more like fishing. It may be exciting to jump in chasing fish with your hands, but you'll probably have more success on a boat with a pole.

I'd do this since stop losses are vulnerable to gap risk. Yeah, use a spread or otherwise hedge so that you can at most lose 2000$. You will lose some short term Delta, but this allows the trade to recover value if it goes below your stop.