Investment and derivative contract gains (losses) in the third quarter and first nine months of 2023 and 2022 are summarized as follows (in millions).


	Third Quarter						First Nine Months
	2023			2022			2023			2022
Investment gains (losses):
Equity securities:
Change in unrealized investment gains (losses) during the period on securities held at the end of the period	$	(30,354	)	$	(12,902	)	$	33,267		$	(80,496	)
Investment gains (losses) on securities sold during the period		605			(165	)		1,748			(1,085	)
		(29,749	)		(13,067	)		35,015			(81,581	)
Fixed maturity securities:
Gross realized gains		3			6			135			18
Gross realized losses		(29	)		(433	)		(106	)		(509	)
Other		(3	)		(6	)		2,997			(17	)
Investment gains (losses)		(29,778	)		(13,500	)		38,041			(82,089	)
Derivative contract gains (losses)		—			35			—			(273	)
	$	(29,778	)	$	(13,465	)	$	38,041		$	(82,362	)

Equity securities gains and losses include unrealized gains and losses from changes in fair values during the period on equity securities we still own, as well as gains and losses on securities we sold during the period. In the preceding table, investment gains and losses on equity securities sold during the period represent the difference between the sales proceeds and the fair value of the equity securities sold at the beginning of the applicable period or, if later, the purchase date. As reflected in the Consolidated Statements of Cash Flows, we received proceeds from sales of equity securities of approximately $32.8 billion in the first nine months of 2023 and $17.3 billion in the first nine months of 2022. Taxable gains and losses on equity securities sold are generally the difference between the proceeds from sales and original cost. Equity securities sold produced taxable gains of $759 million in the third quarter and $5.4 billion in the first nine months of 2023 compared to taxable gains of $3 million in the third quarter and taxable losses of $660 million in the first nine months of 2022. Other investment gains in the first nine months of 2023 included approximately $3.0 billion from the remeasurement of our pre-existing 38.6% interest in PTC through the application of acquisition accounting under GAAP.