Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.  

COMPANHIA SIDERÚRGICA NACIONAL

Corporate Taxpayer’s ID (CNPJ/MF): 33.042.730/0001-04

Publicly-held Company

NOTICE TO THE MARKET

On November 16, 2015, we received Bovespa Official Letter 3433/2015-SAE with the consultation transcribed below:

“The article published on Valor Econômico newspaper on November 16, 2015, includes, among other information, the following content:

ü The company expects Ebitda, which was R$853 million between July and September, to return to the level of R$1 billion in the next balance sheet;

ü At the end of this quarter, leverage, measured by the net debt/Ebitda ratio, will be reduced;

ü The Ebitda margin from mining operations, which was 42%, may reach 50% at the close of the current quarter.

We did not identify this information on the documents sent by the company through the Empresas.NET system. In case of contradiction, please inform the document and pages containing such information and the date and time when they were sent”. 

About the abovementioned, we clarify the following:

·        On November 13, 2015, the Company held a conference call to disclose its results for the third quarter of 2015 (“Conference Call”) when these statements, among other information, were made based on Management’s estimates.

·        The Conference Call had its schedule previously announced and the event was open to the market in general and broadcasted live on the internet (webcast), with wide participation of investors and analysts.

·        Both presentation and full content of the Conference Call audio are available on CSN's Investor Relations website (www.csn.com.br/ir), on the “Webcast 3Q15” section.

·        At the beginning of the Conference Call, the announcement below regarding potential comments from Management was made:

Certain statements made during the conference call regarding CSN’s future performance, estimates and operating and financial goals are based on the beliefs and assumptions of the Company’s management, and on information currently available to the Company.  Forward-looking statements are not a guarantee of performance.  They involve risks, uncertainties and assumptions because they relate to future events and therefore depend on circumstances that may or may not occur in the future.  Investors should understand that general economic conditions, industry conditions and other operating factors could also affect CSN’s future results and could cause results to differ materially from those expressed in such forward-looking statements”.

We are at your disposal for any further clarifications deemed necessary.

São Paulo, November 17, 2015.

______________________________________________________

Gustavo Henrique Santos de Sousa

Executive Officer