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OverviewChair/Advisory CommitteePlansReports/StudiesPlan Participants




PLAN



On May 31, 2012, the Securities and Exchange Commission (SEC) approved, on a
pilot basis, a National Market System Plan, known as the Limit Up/Limit Down
(“LULD”) Plan, to address extraordinary market volatility. The Plan was approved
as a permanent rule on April 11, 2019.

The LULD Plan is administered by the LULD Operating Committee, comprising a
representative from each of the Participants. The current Participants are the
Cboe BZX Exchange, Inc., Cboe BYX Exchange, Inc., Cboe EDGX Exchange, Inc., Cboe
EDGA Exchange, Inc., Financial Industry Regulatory Authority, Inc., Investors
Exchange LLC, Long-Term Stock Exchange, NASDAQ BX, Inc., NASDAQ PHLX LLC, The
Nasdaq Stock Market LLC, New York Stock Exchange LLC, NYSE American LLC, NYSE
Arca, Inc., NYSE Chicago, Inc., and NYSE National, Inc. The Plan and any
amendments to it are filed with and approved by the Securities and Exchange
Commission in accordance with Section 11A of the Securities Exchange Act of
1934.




OVERVIEW



The Plan is designed to prevent trades in NMS Stocks from occurring outside
specified price bands, which are set at a percentage level above and below the
average reference price of a security over the preceding five-minute period. The
percentage level is determined by a security’s designation as a Tier 1 or Tier 2
security. Tier 1 comprises all securities in the S&P 500, the Russell 1000 and
select Exchange Traded Products (ETPs). Tier 2 comprises all other NMS
securities, except for rights and warrants, which are specifically excluded from
coverage. The Plan applies during regular trading hours of 9:30 am ET - 4:00 pm
ET.


CALCULATION OF PRICE BANDS



The price bands, consisting of a Lower and Upper Price Band for each NMS Stock,
are calculated by the two SIPs – CTA and Nasdaq UTP. The SIPs calculate upper
and lower price bands by applying a formula to a Reference Price, which is the
arithmetic mean price of Eligible Reported Transactions over the prior five
minute period. (The first Reference Price of the day is either the primary
market’s opening price or the primary market’s previous day’s closing price/last
sale when opening on a quote. If no eligible trades have occurred in the prior
five minutes, the previous Reference Price remains in effect. The Reference
Price is updated after 30 seconds only if a new Reference price would be least
1% away from the current Reference Price.

The Price Bands are calculated by multiplying the current Reference Price by the
applicable Percentage Parameter and then adding or subtracting that value from
the Reference Price and rounded to the nearest penny.

Price Band = (Reference Price)+/- ((Reference Price)x (Percentage Parameter))


TIER 1 SECURITIES AND TIER 2 SYMBOLS BELOW $3.00 (9:30AM - 3:35PM)


PREVIOUS CLOSING PRICE

Greater than $3.00
$0.75 up to including $3.00
Less than $0.75


PERCENTAGE PARAMETER

5%
20%
Lesser of $0.15 or 75%


TIER 2 SECURITIES (9:30AM - 4:00PM)


PREVIOUS CLOSING PRICE

Greater than $3.00


PERCENTAGE PARAMETER

10%

Price Bands are doubled during last 25 minutes of the regular trading day for
all Tier 1 Securities and for Tier 2 Securities below $3.00.



Illustration: Assume that “XYZ” is a Tier 1 security and has a previous closing
price of $25. As such, its percentage parameter would fall within the first
bucket (Greater than $3.00) of Table 1 above. Security XYZ would therefore have
upper and lower price bands that are 5% greater ($26.25) and lower ($23.75) than
that of the previous closing price, respectively. The bands would be as follow:




OPERATION OF PRICE BANDS



When the National Best Bid (Offer) is below (above) the Lower (Upper) Price
Band, the SIPs disseminate the National Best Bid (Offer) with an indicator
identifying it as unexecutable. Trading immediately enters a Limit State if the
National Best Offer (Bid) equals but does not cross the Lower (Upper) Price
Band. When a Limit State occurs, the SIPs indicate the National Best Bid (Offer)
as a Limit State Quotation. Trading exits a Limit State if, within 15 seconds of
entering the Limit State, all Limit State Quotations are executed or canceled in
their entirety. If the market does not exit a Limit State within 15 seconds, the
primary listing exchange declares a five-minute Trading Pause. The Trading Pause
may be extended for another five minutes. Thereafter, all markets may resume
trading. If a security is in a Trading Pause during the last 10 minutes of
regular trading hours, the primary listing exchange will not reopen trading and
will attempt to execute a closing transaction using its established closing
procedures.

A Straddle State occurs when the National Best Bid (Offer) is below (above) the
Lower (Upper) Price Band and the NMS Stock is not in a Limit State. For example,
assume the Lower Price Band for an NMS Stock is $9.50 and the Upper Price Band
is $10.50, such NMS stock would be in a Straddle State if the National Best Bid
were below $9.50, and therefore non-executable, and the National Best Offer were
above $9.50 (including a National Best Offer that could be above $10.50). If an
NMS Stock is in a Straddle State and trading in that stock deviates from normal
trading characteristics, the primary listing exchange may declare a Trading
Pause for that NMS Stock.

Please consult each Participant market’s trading rules to learn how its order
types are treated under the Plan.