Locked means that two or more exchanges are showing the same price on the bid/ask. For example:Quote from heilbronner:
Hi Nitro,
sorry but I don't understand what you mean by "locked". The orders were simlpe limit orders.
Quote from nitro:
Locked means that two or more exchanges are showing the same price on the bid/ask. For example:
Bid Exch Ask
==========
.75 AMEX .80
.80 CBOE .85
.70 PHLX .80
.75 PSE .85
.75 ISE .85
.75 BOX .85
In this case, the CBOE is locked with the AMEX and the PHLX.
Crossed means that two of more exchanges has a price that has a higher bid than the ask on another exchange(s.) For example
Bid Exch Ask
==========
.75 AMEX .90
.75 CBOE .90
.70 PHLX .80
.75 PSE .80
.85 ISE .90
.70 BOX .90
In this case, the ISE is crossed with the PHLX and the PSE.
Some people use the terms crossed and inverted respectively.
nitro
Quote from mskl:
this was probably an erroneous trade. You bought the puts at $13.60 at 9:58:02
There were $15, $15.20 prints around the same time.
If you read the obvious error rule (720) you will see that if you buy .80 lower than the theoretical value (for options priced from $10-$20) than the trade can be deemed erroneous. I don't have the best bid at the time but based on the trades that took place it appears that you probably bought ($13.60) when the national best bid was at least $14.40 bid.
You should always be concerned when it is "this good". BTW the ISE actually has the best bust policy. You should see what the PSE/AMEX/CBOE can bust.
know the rules..............