The FTSE 100 index is on track to achieve its 15th consecutive day of gains, reflecting sustained positive momentum in the UK stock market. Key corporate developments contributing to this trend include Shell's announcement of a $3.5 billion share buyback program following earnings that exceeded market expectations. Similarly, Dutch lender ING reported first-quarter profits surpassing estimates and declared a fresh €2 billion share repurchase. Additionally, NatWest and Standard Chartered also reported earnings above forecasts, supporting investor confidence. These corporate earnings and buyback initiatives have bolstered the overall market sentiment, reinforcing the FTSE 100's continued upward trajectory.