Gold prices are having trouble lifting above $1,300 an ounce this week, despite rising geopolitical concerns between Russia and Ukraine. ETF Securities U.S. research director Mike McGlone tells TheStreet's Joe Deaux that gold is up more than $100 this year and he thinks more upside remains in the price of the yellow metal. When asked whether people should allocate more of their portfolio into gold ETFs before the slow August arrives, McGlone said he thinks now is a good buying opportunity. Gold fell more than 1% this week and more than 2% last week, after gaining in the first week of July.

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