Analyst ratings and price targets can significantly influence investor sentiment and stock prices. A 'Buy' rating suggests that the analyst believes the stock will outperform the market, while the price target indicates the level at which the analyst believes the stock will trade in the future. In this case, the reiteration of a 'Buy' rating and maintenance of an $85 price target for Blueprint Medicines by HC Wainwright & Co. could potentially lead to increased investor confidence and a positive short-term impact on the company's stock price.