Brief: A-Mark Precious Metals to fully acquire AMS to further expand into collectible coin market
March 10 (Reuters) - A-Mark Precious Metals Inc AMRK.O: A-MARK PRECIOUS METALS INC: ENTERS INTO DEFINITIVE AGREEMENT TO BUY 90% OF AMS HOLDINGS Source text: nGNX2rn7GF Further company coverage: AMRK.O ((Reuters.Briefs@thomsonreuters.com;))