The reiteration of an 'Outperform' rating by a reputable analyst like Shelby Tucker from RBC Capital is a positive signal for Edison Intl. It suggests that the analyst believes the company's stock will outperform the market or its sector in the near term. The maintained price target of $81 also indicates that the analyst believes the stock is still undervalued at its current price, which could lead to upward price movement in the short term.