The Somerville Stock Exchange rings its closing bell on Sunday. The yearlong public art project, undertaken by Tim Devin, was not your ordinary stock market; it fluctuated based on contributions to the city’s environment, community ,and creative elements, as well as with donations to local charities. The exchange closes one year to the day after it opened. On Tuesday, a year-end report will be revealed, which can be viewed on the exchange’s website, www.timdevin.com/somervillestockexchange.html.
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