Hong Kong’s booming fundraising market is set for another busy week, with four companies scheduled to debut this week and a string of billion-dollar listings – including Chinese luxury electric vehicle maker Avatr Technology – lining up behind them. Among this week’s newcomers, chip materials supplier Guangdong Tianyu Semiconductor plans to raise the highest sum, seeking up to HK$1.74 billion (US$223.42 million) from the sale of 30.07 million shares. The shares have been priced at HK$58 each....