BUZZ-Visa Inc: Walmart Canada to stop accepting Visa
** World's largest payments network operator's shares down 1.3 pct at $79.16
** Walmart Canada to stop accepting Visa, says fees too high
** Walmart unable to agree with Visa on an "acceptable fee," and will no longer accept the company's credit cards starting July 18
** Move will not affect U.S. stores of parent Wal-Mart Stores Inc
** Shares touch 2-week low at $78.87 in session
** Up to Friday's close, stock had risen about 1.6 pct compared with a 9.1 pct increase in the S&P Data Processing & Outsourced Services Index
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