This is a summary. To read the whole story subscribe to BostonGlobe.com
Cigarette maker Altria Group Inc. agreed to buy Green Smoke Inc. for about $110 million in cash, adding to a growing trend of big tobacco firms jumping into the e-cigarette market. Green Smoke has operations in the United States and Israel and has sold e-cigarette products since 2009. Its revenue last year was about $40 million, a fraction of Altria’s $24.5 billion. Altria’s stock, however, fell as investors raise concerns over unknowns in the e-cigarette industry and whether Altria’s investment capital could be put to better uses.