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I am not an accountant but my understanding is that the "disallowed" cost basis should always get pushed to some new position, so you should never "lose" cost basis -- it just gets moved to a position that is closed out at some later date. You can familiarize yourself with the rules and their...

For those of us who use Ameritrade's more customizable features such as APIs, I'd say that it is good news that it is delayed -- hopefully, Schwab's management doesn't wreck Ameritrade's more advanced features the same way they wrecked CyberTrader when they acquired it years ago.

Nanex Nxcore provides the full OPRA feed including CBOE best bid/offer real time for all US options for a few thousand per month, or just the OPRA top-of-book for somewhat less, and that is real-time; their historical data are in the same format and are somewhat cheaper than real-time. It comes...

Off-exchange TRF data does come via the SIP feeds. Nasdaq Level 2 technically means top-of-book for each NSDQ market maker. This has become far less relevant over time. Most traders seem to confuse Level 2 with full book, so you can take some solace in that you are already far more informed...

Thank you for sharing your setup! I don't know if this is helpful at all in your case, but you can host a (much flatter!) server in a major datacenter for as little as maybe $120 a month, including electricity and blended Internet, and have zero downtime. Latency is also far better than from...

NxCore has a beta Linux version and will support it eventually. I use it in non-production cases and it seems to work well. It also runs well (production level, months at a time with no restart) under Linux's Wine emulator.

You are correct, I could have been more clear... I was speaking of heavily-promoted retail forex pure-plays, most of which are offshore and are borderline (if not outright) scams. IB, in contrast, seems to offer good rates, as do a number of institutional brokers who are not primarily forex...

With that size, have you considered trading currency futures instead? In the US at least, futures brokers have much tighter regulations than retail forex brokers (many of which seem to be offshore), and futures trade on a real, open exchange with competitive bids and offers, vs. retail forex in...

I am undecided on the merits of this petition, but I do find it funny how change.org itself is trying to deceive people about how actively people are signing (try loading, watching, then reloading the page and see what happens...).

I thin you are right in that the market benefits from crowd wisdom. But keep in mind that the market price of any given stock represents expected future returns, so the cow guessing game is interesting, but a different problem; with the market, we don't know the answer to the "cow weight" until...

No, such a limit is fine and probably a good idea from the perspective of safety (e.g. against melt-ups), though such safety matters less in liquid markets. If you replace "limit" with "stop" in your statement, however, then you are correct that it would be invalid.

It is due to American vs. European expiry, American expiry having higher IV due to early assignment risk, supposedly. I don't know exactly how much this impacts the IV of these series in practice; the bid/ask spread for SPX does seem a bit wider (due to contract size and/or popularity with...

I stand corrected; I was using post-close data from web sites that were erroneous. Today I can see from higher-quality, real-time feeds that the IV is indeed slightly lower for SPX, at least for the strikes I looked at. Mea culpa!

My understanding is that SPY options normally have higher implied volatility than do options on SPX, but at the moment it appears that IV (and prices) are higher for SPX, at least for immediate timeframes (ATM e.g. Nov 4 expiry). Does anyone know why this would be the case?

Correct. And the info as to which trades are dark is included in the SIP data and any quote system that chooses to redistribute SIP data with the exchange attribute set in the trades. The trades with the exchange as the TRF include both dark pools and internalizers/wholesalers -- i.e., all...

I've experienced this. If the account is SIPC and/or supplementally insured and your account is within the limits, SIPC figures it out. What you actually get (in terms of securities positions vs. cash) coming out of it is messy. But the dollars and cents should add up, in the end -- at least...

In my experience, these "shareholder lawsuits" are initiated by attorneys who can legally force investors to sue themselves, since the money is typically paid out of the coffers of the company in which the shareholders still typically hold ownership. Shareholders are paid pennies on the dollar...

Also, ETrade has an API, which may provide you a route by which you can make your own custom order type, if you know one of the programming languages they support (or if you know or can hire someone who does): https://developer.etrade.com

NxCore has full-feed Level 2 for US equities and full book for some other products.

It's an interesting product for some applications, but its vertical resolution of 1080 makes it a poor choice for coding, IMO. That's like going back to circa year 2003.