(4) Assets and Liabilities Measured at Fair Value

For assets and liabilities required to be reported at fair value, GAAP provides a hierarchy that prioritizes inputs to valuation techniques used to measure fair value into three broad levels. Level 1 inputs are quoted market prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 inputs are inputs, other than quoted market prices included within Level 1, that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. The Company does not have any recurring assets or liabilities measured at fair value that would be considered Level 3.

The Company’s assets and liabilities measured at fair value are as follows:

(1)As of December 31, 2016, the Company had an outstanding zero-strike call option on 704,908 shares of Liberty Broadband Series C common stock which expired in March 2017. The Company prepaid a premium of $47.9 million in December 2016. Liberty Broadband exercised its option to settle the contract in cash in March 2017 for cash proceeds of $50.0 million. The Company accounted for the zero-strike call option as a financial instrument asset due to its settlement provisions. The Company entered into another zero-strike call option on 527,156 shares of Liberty Broadband Series C common stock and prepaid a premium of $47.7 million in October 2017. Upon expiration of the contract in December 2017, the Company elected to physically settle 527,156 shares of Liberty Broadband Series C common stock at a price of $90.54 per share.

The fair value of Level 2 derivative instruments were derived from a Black-Scholes model using observable market data as the significant inputs. The inputs used in the model during the period outstanding (exclusive of the applicable trading price of Series C Liberty Broadband common stock and the strike prices associated with the call options) were as follows:

Other Financial Instruments

Other financial instruments not measured at fair value on a recurring basis include trade receivables, trade payables, accrued and other current liabilities, current portion of debt and long-term debt. With the exception of long-term debt, the carrying amount approximates fair value due to the short maturity of these instruments as reported on our consolidated balance sheets. The carrying value of our long-term debt bears interest at a variable rate and therefore is also considered to approximate fair value.

Realized and Unrealized Gains (Losses) on Financial Instruments

Realized and unrealized gains (losses) on financial instruments are comprised of changes in the fair value of the following: 

(1)As of December 31, 2014, the Company had an outstanding written call option on 625,000 Time Warner Cable shares with a strike price of $92.02 per share which expired in February 2015. Upon expiration, this written call option was rolled into a new written call option on 625,000 Time Warner Cable shares with a strike price of $100.39 per share which the Company cash settled during June 2015 for $48.3 million. Additionally, as of December 31, 2014, the Company had another outstanding written call option on 625,000 Time Warner Cable shares with a strike price of $90.84 per share which the Company cash settled during April 2015 for $36.7 million.

(2)On March 27, 2015, Liberty Broadband entered into a cashless collar agreement with a financial institution on 1.7 million Time Warner Cable shares held by the Company with a put option strike price of $136.80 per share and a call option strike price of $161.62 per share. The collar was originally scheduled to expire during March 2017. The Company unwound the agreement during July 2015 for $67.1 million cash paid to the counterparty. In connection with this collar agreement, the Company also entered into a revolving loan agreement with an availability of $234 million, which was terminated upon unwinding of the collar agreement during July 2015 (note 6). 

(3)As discussed in note 5, Time Warner Cable merged with Charter on May 18, 2016. Therefore the Company no longer has an investment in Time Warner Cable as of May 18, 2016, and the unrealized gain (loss) related to our investment in Time Warner Cable is recorded through this date. In connection with the merger, the Company exchanged, in a tax-free transaction, its shares of Time Warner Cable for shares of Charter Class A common stock.

(4)As of December 31, 2016, the Company had an outstanding zero-strike call option on 704,908 shares of Liberty Broadband Series C common stock which expired in March 2017.  The Company had an unrealized gain on the option during 2016 primarily due to an increase in the market price of Liberty Broadband Series C common stock during that period. In April 2017, the Company entered into another zero-strike call option on 600,242 shares of Liberty Broadband Series C common stock. The Company prepaid a premium of $50.0 million in April 2017. Upon expiration in June 2017, the call option was rolled into a new zero-strike call option on 600,242 shares of Liberty Broadband Series C common stock. Liberty Broadband exercised its option to settle the contract in cash in August 2017 for cash proceeds of $53.8 million. The Company realized gains on the options outstanding and settled during the current year primarily due to an increase in the market price of Liberty Broadband Series C common stock during that period.