$INSW, a stock in the shipping sector, is experiencing a notable increase in pre-market trading, rising 12.5% to $38 per share. This surge follows the announcement of its index inclusion the previous night, which contributed to high trading volume of over 160,000 shares after hours. The stock opened consistently with pre-market trends, indicating strong investor interest. Meanwhile, $VTY shareholders were acknowledged in a separate message, although no specific details about $VTY's performance were provided.