Citigroup maintains a Neutral rating for Rio Tinto Ltd (NYSE:RIO) and raises the price target, indicating a positive future performance.Rio Tinto is expected to increase its copper production by about 20% over the next three years, driven by the ramp-up at the Oyu Tolgoi mine.The company's strategic diversification efforts are anticipated to shift its earnings composition, reducing the contribution of iron ore to group earnings from 81% in 2023 to 48% by 2026.Rio Tinto Ltd (NYSE:RIO) is a leading global min ...