NOTE 4 - TRADING ASSETS AND LIABILITIES AND DERIVATIVE INSTRUMENTS

The fair values of the components of trading assets and liabilities and derivative instruments are presented in the following table:



(Dollars in millions)	June 30, 2018		December 31, 2017
Trading Assets and Derivative Instruments:
U.S. Treasury securities		$203		$157
Federal agency securities	502		395
U.S. states and political subdivisions	27		61
MBS - agency	759		700
Corporate and other debt securities	872		655
CP	114		118
Equity securities	57		56
Derivative instruments ¹	567		802
Trading loans ²	1,949		2,149
Total trading assets and derivative instruments		$5,050		$5,093

Trading Liabilities and Derivative Instruments:
U.S. Treasury securities		$779		$577
MBS - agency	1		—
Corporate and other debt securities	534		289
Equity securities	14		9
Derivative instruments ¹	630		408
Total trading liabilities and derivative instruments		$1,958		$1,283

¹Amounts include the impact of offsetting cash collateral received from and paid to the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists.

² Includes loans related to TRS.

Various trading and derivative instruments are used as part of the Company’s overall balance sheet management strategies and to support client requirements executed through the Bank and/or STRH, a broker/dealer subsidiary of the Company. The Company manages the potential market volatility associated with trading instruments by using appropriate risk management strategies. The size, volume, and nature of the trading products and derivative instruments can vary based on economic conditions as well as client-specific and Company-specific asset or liability positions.

Product offerings to clients include debt securities, loans traded in the secondary market, equity securities, derivative contracts, and other similar financial instruments. Other trading-related activities include acting as a market maker for certain debt and equity security transactions, derivative instrument transactions, and foreign exchange transactions. The Company also uses derivatives to manage its interest rate and market risk from non-trading activities. The Company has policies and procedures to manage market risk associated with client trading and non-trading activities, and assumes a limited degree of market risk by managing the size and nature of its exposure. For valuation assumptions and additional information related to the Company's trading products and derivative instruments, see Note 15, “Derivative Financial Instruments,” and the “Trading Assets and Derivative Instruments and Securities Available for Sale” section of Note 16, “Fair Value Election and Measurement.”

Pledged trading assets are presented in the following table:



(Dollars in millions)	June 30, 2018		December 31, 2017
Pledged trading assets to secure repurchase agreements ¹		$1,092		$1,016
Pledged trading assets to secure certain derivative agreements	65		72
Pledged trading assets to secure other arrangements	40		41

¹ Repurchase agreements secured by collateral totaled $1.1 billion and $975 million at June 30, 2018 and December 31, 2017, respectively.