Analyst ratings, especially those that reiterate a positive outlook, can have a significant short-term impact on a stock's price. The reiteration of a 'Market Outperform' rating and a high price target of $106 by JMP Securities for Cytokinetics suggests a strong vote of confidence in the company's future performance. This endorsement is likely to influence investor sentiment positively, potentially leading to an increase in stock price in the short term.