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Circumstantial, but not strong enough to establish manipulation on its own weight. Who shorted? Who started the rumors? There's a strong human tendency to believe in conspiracies when all you have is coincidence, or common independent action based on a similar interpretation of market data...

This story says says that there was lots of short selling and some of it was naked. It implies but offers no evidence that the short selling was done with the purpose of forcing the price down. It is sponsored by the president of OverStock.com, who has long crusaded against short sellers...

I'm not looking for a book. Just a reference that can be researched and leads to a magazine or newspaper article or any other authoritative account. I can easily find references for "pump and dump" schemes, for example Widipedia references "Born To Steal" by Gary Weiss. You say there's a...

It is frequently claimed that short sellers target a specific stock in the hopes of driving its price down so it can be covered at some point in the future. I know there are cases of manipulating prices up intending to sell into rising prices. People have been convicted in these pump and...

I have had several shorts bought in on me, including three with no prior notice of any type until they showed up on my nightly trade confirmations. Sometimes an email and a TWS message are sent on shorts that might be bought in. Sometimes the nightly confirmation is a posting for a future...

I'm a happy with IB, but TWS failed to send me about a dozen quantity change acknowledgements through out the day. I could see them reflected in TWS, but never received the open order and order status events via the API. Has anyone else ever had a similar experience?

If their response was really to cancel opens 20 percent from the previous close then I really feel screwed. Many major components of the IYF opened 30-40+% over the previous close. The underlying index might well have opened up 25%, not that far from where IYF actually opened. To use an...

On 9/19/08 I had an order working to sell IYF, an ETF listed on ARCA, on the ARCA open. I received a fill of 94. This was 34.9% higher than the previous close 69.66. An extraordinary move, but 9/19 was an extraordinary day marked with numerous dramatic opens. Many stocks including ETFs had...

On 9/19 I sold IYF on the ARCA opening cross at 94.00. While the opening price was 35% higher than the previous close there was no reason to suspect that 94 was a bad price that would be canceled. 9/19 was a volatile day. Another stock I have, MS, opened up 42%. I can cite dozens of examples...

Surdo, thanks for the response. Both my quote vendor, CSI, and INO have the pit high as 139.00. I'm at a loss to explain the difference between them and the electronic market. Do you know if the pit trading bears any resemblance to reality? I've noticed the currency pit trading is...

I'm just getting back into futures trading and find that electronic markets have substantially displaced the pit, but I want to trade pit hours. Today I placed an order to buy sept CL market with a good after time of 9:00:20. IB executed it at 9:00:20 and I got a fill of 139.47 and when I...

I had no trouble buying OSK through IB on 6/26.

I frequently have 100 executions in a day. I only request all orders or executions after a connection failure. I trust my ATS implementation to properly track orders and executions. I wouldn't work with an ATS that I did not trust. I assume the 50 message limit is designed to prevent...

Your order was routed to NSX (or should I say a market maker that executed it on NSX?), not the NYSE. Since the Reg NMS trade-through rule does not apply to the closing cross, the NYSE was not under any obligation to protect top-of-book. The order is not due a fill. That's a downside of...

My experience has been that the 50 message/sec limit applies to api calls made to IB, not to their response. So requesting all open orders would count as one. I often cancel or submit 100+ orders without problem. I ensure that I never submit more than 50 messages in any one second period...

While I believe IB tries to charge unbundled commissions correctly, you cannot trust that they will. Some months ago NYSE changed their fees substantially. IB did not come close to correctly charging the new fee schedule, resulting in substantial overcharges. It took me 1-2 months of nagging...

Now that NYSE is buying AMEX, IB has no plans to fix this. They assume NYSE will kill AMEX. Perhaps they will, but meanwhile beware. I've seen these ETFs trade several hundred thousand shares before the low volume AMEX open.

That would be nice, but I get the impression that the SMART development group is always busy and implementing a Reg NMS exclusion option would be difficult and increase their legal liability. It wouldn't surprise me if their legal dept said no way. I expect this option is permanently off the...

You cannot place an on open order until sometime prior to the open. I don't know the exact time, but I'm pretty sure I've placed them at 9 pm the night before.

Well I flagged my ARCA listed ETF orders and checked them this morning. One, INP, was correctly routed for the ARCA open. The other two, EWM and IYG, were routed to AMEX. I canceled them and tried to direct route them using TWS. TWS would not allow a OPG time in force for ARCA market...