The increase in price target from $809 to $907 by RBC Capital indicates a positive outlook on W.W. Grainger's stock performance in the short term. This adjustment suggests that the analyst sees potential for growth or positive movement in GWW's stock price, likely due to factors such as strong financial performance, market position, or other positive indicators that have led to the revised target. Investors may view this as a bullish signal, potentially leading to increased buying interest and a positive impact on the stock price in the short term.