3 Min Read BUENOS AIRES, July 12 (Reuters) - Argentina’s securities regulator tightened rules on some bond trades on Monday, lowering a weekly limit on trading of local and international bonds amid a wider clampdown on alternative channels used to access foreign exchange. The measure from the National Securities Commission (CNV), published in the official gazette, halved the cap on weekly trades per account to 50,000 local law bonds and to the same level for international law bonds. In an easing move, it reduced the amount of time traders must hold the securities before reselling them to tw...