Self-Help Declarations Under Reg NMS Rule 611
Self-help declarations let one venue route around another's broken quote under Reg NMS. What changes for ISOs, and why the tape can print an impossible NBBO.
#nbbo
Filtering by topic #nbbo · clear
Why Overnight Orders Must Be Limit Orders
Overnight orders must be limit orders. In the 8 p.m. to 4 a.m. ET session there is no consolidated quote to protect a print, and a book one order can sweep.
Why Stock Quotes Are Delayed 15 Minutes
Why are stock quotes delayed 15 minutes? How exchange data licensing sets the rule, and what a quarter hour of staleness actually costs on real prices.
What Is the NBBO? National Best Bid and Offer
The NBBO is the national best bid and offer, the one consolidated stock quote your broker must match or beat. See how fast it updates, from real tick data.