Analyst upgrades typically lead to positive short-term price movements as they reflect a positive change in the analyst's view of the company's future prospects. The upgrade from Perform to Outperform suggests that Oppenheimer sees significant upside potential for ALDX, potentially making it more attractive to investors. The announcement of a $10 price target further underscores the analyst's bullish outlook, likely leading to increased investor interest and potentially higher stock prices in the short term.