hong konglisted casino shares fell broadly on monday after macau tightened quarantine requirements for some travelers amid a jump in covid19 cases in china sjm holdings ltd was off 10 at 328 hong kong dollars us042 by midday putting it on track for its biggest oneday percentage drop in six months sands china ltd fell 92 and melco international development ltd lost 91 health authorities in the gambling hub said sunday that travelers who visited certain areas of chinas guangdong province will now have to serve seven to 14 days in quarantine upon arrival in macau the restriction applies to visitors of zhongshan and shenzhen cities and to areas of guangzhou yangjiang and dongguan the move came after beijing imposed new lockdowns in shenzhen and shanghai to curb a surge in covid19 cases china battling its worstever outbreak of the virus in two years on sunday reported nearly 3400 daily cases vitaly umansky managing director and senior analyst of global gambling at alliancebernstein said that there has been a significant reduction in travel within china in recent weeks and that the number of visitors from china could fall further as beijing advises citizens against traveling if macau were to suffer a significant covid19 outbreak the worstcase scenario could include border closures which would weigh on casino operators that have already been hurt by two years of reduced visitation he said ben lee managing partner and founder of macaubased consultancy igamix said that the new restrictions will further weigh on visitation to the casino hub we are getting more sameday visits but not the longerstaying players he said