By Yoruk Bahceli (Reuters) -Germany’s five-year bond yield staged its biggest one-day drop since March 1 on Thursday as business activity data disappointed and Germany’s decision to trigger the alarm stage of an emergency gas plan stoked global recession fears. Across the euro zone and the United States, bond yields slid. They have risen sharply in recent weeks in the face of red-hot inflation and aggressive central bank rate hikes, but on Thursday recession fears gripped markets. S&P Global’s flash euro zone composite purchasing managers’ index dropped to 51.9 in June from 54.8 in May, indica…