New Zealand golfer Lydia Ko has stormed into a share of the lead midway through her second round at the final LPGA tour event of the year in Florida.
The 18-year-old started the day tied for ninth but climbed to equal first by birdieing four of her first nine holes.
Ko was four under par for the day and seven under for the tournament, tied at the top with South Korea's Ha Na Jang.
