Sal Mancuso
Executive Vice President Chief Financial Officer at Altria Group
Thanks, Billy. In the second quarter, the consumer behaviors we've observed over the past few quarters largely continued. Although overall consumer mobility increased, workplace mobility appeared to be relatively unchanged, which we believe contributed to more tobacco usage occasions during the quarter as compared to prepandemic levels. Additionally, disposable income remained elevated partially due to the residual effects of the third federal government stimulus package in March. At retail, we estimate that compared to prepandemic levels, the number of tobacco consumer trips to the store continued to be depressed, but tobacco expenditures per trip remained elevated. We are keeping a close eye on tobacco consumer behaviors, and we will continue to provide our insights on the factors impacting those behaviors as the year progresses.
Moving to our businesses. The smokeable products segment expanded its adjusted OCI margins by 0.6 percentage points to 58.4% for the second quarter and by 1.5 percentage points to 58% for the first half. This performance was supported by PM USA's revenue growth management framework, which leverages advanced analytics to guide the strategic and efficient allocation of our promotional resources. As a result, PM USA achieved strong net price realization of 8.3% in the second quarter and 8.1% for the first half. Smokeable segment reported domestic cigarette volumes increased by 1.4% in the second quarter. For the first half, reported domestic cigarette volumes declined by 5.3%.
When adjusted for calendar differences, trade inventory movements and other factors, second quarter and first half domestic cigarette volumes declined by an estimated 4.5% and four percent respectively. At the industry level, we estimate that adjusted domestic cigarette volumes declined by five percent in the second quarter and by four percent in the first half. Marlboro sustained a strong retail performance demonstrated in recent quarters and benefited from the overall strength of the premium segment in the second quarter. Marlboro's second quarter retail share of the total cigarette category was up 1/10 sequentially to 43.2% and up 5/10 versus the year ago period. In discount, total segment retail share in the second quarter increased 1/10 year-over-year but declined 3/10 sequentially to 25%. Sequential share losses in both branded and deep discount products drove the contraction as consumers benefited from the federal government's third stimulus package and continued heightened promotional spending among competitive premium brands.
We continue to observe some elevated promotional activity within the branded discount segment during the second quarter. And as a result, Marlboro's price gap to the lowest effective price cigarette remained elevated at 37%. In cigars, Middleton continues to perform well and Black & Mild maintained its leadership position within the profitable tipped cigar segment. Reported cigar shipment volume increased by 9.6% in the first half. Turning to the oral tobacco products segment. Segment adjusted OCI margins decreased to 71.7% for the second quarter and to 71.9% for the first half. We expect oral tobacco products margins to be impacted by increased investments behind on! and shifting mix between MST and oral nicotine pouches.
We remain extremely pleased with the strong overall margins for the segment. Total reported oral tobacco products segment volume increased by 1.8% and by 1.2% for the second quarter and first half, respectively. The segment's volume growth was driven by on!, which more than offset a moderate decline in MST volumes. When adjusted for trade inventory movements and calendar differences, segment volume increased by an estimated one percent for the second quarter and 0.5% for the first half. Oral tobacco products segment retail share for the second quarter declined 2.2 percentage points versus the prior year and 3/10 sequentially to 47.8% due to the continued growth of the oral nicotine pouch category.
As Billy stated, Copenhagen maintained its leadership position in the MST category. And we continue to work diligently to execute our plans to transition smokers to on! In e-vapor, total estimated volumes in the second quarter increased 15% versus a year ago and two percent sequentially as a result of heightened competitive activity. The category continues to undergo a transition period as FDA prepares to make market determinations on the millions of PMTAs filed by the September 2020 statutory deadline. We continue to believe that e-vapor products can play an important role in tobacco harm reduction and that a sustainable e-vapor category will be one that consists solely of FDA-authorized products.
We expect the category's long-term trajectory to be determined by regulatory decisions, legislative and tax policy and innovation that best addresses smoker and vapor preferences. In alcohol, we recorded $113 million of pretax adjusted equity earnings from ABI in the second quarter. This was an increase of approximately 15% from the year ago period and represents Altria's share of ABI's first quarter 2021 results. In wine, Ste. Michelle's second quarter adjusted OCI increased approximately 80% to $27 million. Ste. Michelle's adjusted OCI growth was primarily due to higher volumes, including from the flagship Chateau Ste. Michelle brand and luxury brand Stags Leap, as wine consumer preferences trended to more premium products. Three weeks ago, we announced the definitive agreement to sell our Ste. Michelle Wine Estates business in an all-cash transaction for a purchase price of approximately $1.2 billion and the assumption of certain Ste. Michelle liabilities.
We expect the transaction to close in the second half of this year, and we expect to use the net proceeds for additional share repurchases, subject to approval by our Board. We believe this transaction demonstrates Altria's continued commitment to value creation for shareholders and to our vision as it allows our management team to maintain its focus on responsibly transitioning adult smokers to a smoke-free future. Ste. Michelle and its talented employees have built an outstanding portfolio of premium wine brands, and we wish them future success. And in our all other operating category, we continue to make progress on our wind-down of Philip Morris Capital Corporation. As of June 30, the net finance assets balance was $261 million, down $59 million since the end of last year due to rents received and asset sales in the first and second quarters.
We expect to continue reducing this balance in 2021 and expect to complete the PMCC wind-down by the end of 2022. Turning to our equity investment in Cronos. We recorded a pretax loss of $21 million, representing Altria's share of Cronos' first quarter results. In the second quarter, Cronos announced that it had purchased an option to acquire an ownership stake in PharmaCann of approximately 10.5% on a fully diluted basis. PharmaCann is one of the largest vertically integrated cannabis companies in the United States. The option exercise will be based upon various factors, including the status of U.S. federal cannabis legalization and regulatory approvals. In our -- in support of our investment in Cronos, we continue to advocate for a federally legal, regulated and responsible U.S. cannabis market.
And we're encouraged by the current momentum towards federal legalization. Next, let's discuss capital allocation. The highly cash-generative nature of our tobacco businesses continues -- contributes to our strong balance sheet. We believe this, in turn, allows us to invest in our vision while rewarding shareholders with cash returns. We were active in the capital markets during the second quarter as we repaid $1.5 billion of notes upon maturity, paid approximately $1.6 billion in dividends and repurchased 6.6 million shares totaling $325 million. We have $1.35 billion remaining under the current authorized $2 billion share repurchase program, which we expect to complete by June 30, 2022. Because the current program is limited to $2 billion, additional share buybacks in connection with the sale of Ste. Michelle are subject to Board approval.
Moving to corporate responsibility. We disclosed several updates in the ESG section of our release this morning. These updates included following through on our commitment to transparency around Altria's workforce data and publishing our ESG data tables and a report on value chain responsibility. As a reminder, additional corporate responsibility information can be found on altria.com. With that, we'll wrap up, and Billy and I will be happy to take your questions. While the calls are being compiled, I'll remind you that today's earnings release and our non-GAAP reconciliations are available on altria.com. We've also posted our usual quarterly metrics, which include pricing, inventory and other items.
Let's open the question-and-answer period. Operator, do we have any questions?