By Charlie Conchie Investor confidence has plunged this month as rampant inflation and global political uncertainty continues to batter public markets, according to a survey of investor sentiment published today. Confidence has fallen across every region globally, with US investors pulling back the most sharply as equity markets remain in turmoil, according to the investor confidence index from retail investment platform Hargreaves Lansdown. The index plummeted 10 points this month, down to 57, with North America confidence plunging the most sharply at 20 points, the index found. Analysts at H…