SHAREHOLDERS' EQUITY (Note)

9 Months Ended

Sep. 30, 2019

Basic and diluted income per share was determined based on the following share data (in thousands):



	Three Months Ended September 30,		Nine Months Ended September 30,
	2019	2018	2019	2018
Weighted average basic common shares	12,890	12,799	12,805	12,437
Effect of stock options	726	758	760	1,160
Effect of dilutive share awards	136	110	176	167
Effect of Convertible Senior Notes and warrants	880	183	888	535
Weighted average diluted common shares	14,632	13,850	14,629	14,299

For each of the three and nine months ended September 30, 2019, the weighted average shares that were anti-dilutive, and therefore excluded from the calculation of diluted income per share, included options to purchase 0.1 million shares of common stock. For the three months ended September 30, 2018, the weighted average shares that were anti-dilutive included options to purchase 0.5 million shares of common stock and 0.1 million restricted stock units. For the nine months ended September 30, 2018, the weighted average shares that were anti-dilutive included options to purchase 0.4 million shares of common stock.

The 0.625% Convertible Senior Notes due June 1, 2022 and the warrants issued by the Company in 2017 could be converted into the Company’s common stock, subject to certain contingencies. See Note 13—Debt for additional information.

Shares of the Company's common stock associated with the warrants were excluded from the calculation of diluted income per share for the three months ended September 30, 2018 as they were anti-dilutive since the strike price of the warrants was greater than the average market price of the Company's common stock during the period.

Common Stock Repurchases

In each of February 2018 and February 2019, the board of directors authorized and the Company announced the repurchase of up to $100.0 million and $150.0 million, respectively, of LendingTree's common stock. During the first nine months of 2019 and 2018, the Company purchased 18,580 and 205,310 shares, respectively, of its common stock for aggregate consideration of $4.3 million and $57.2 million, respectively. At September 30, 2019, approximately $180.9 million of the previous authorizations to repurchase common stock remain available.