(Check out Carter's worthcharting.com for actionable recommendations and live nightly videos.) Cement manufacturers Martin Marietta (MLM) and Vulcan Materials (VMC) are very similar businesses, with the shares in each company having a correlation of 92%. And right now, both stocks are toying with the prospect of breaking out to new 52-week highs and all-time highs. By our work, it is right to be accumulating each stock aggressively. Martin Marietta Materials (MLM) Buy for a breakout to new highs... Vulcan Materials (VMC) Buy for a breakout to new highs... DISCLOSURES: (None) All opinions expressed by the CNBC Pro contributors are solely their opinions and do not reflect the opinions of CNBC, NBC UNIVERSAL, their parent company or affiliates, and may have been previously disseminated by the

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