The report by Gotham City Research implies that Grifols may have undisclosed debts, which could significantly affect investor trust and the company's creditworthiness. Such reports can lead to a negative market reaction in the short term as investors reassess the risk associated with the company's stock. The direct mention of Grifols in the context of potential financial issues makes the news highly relevant and important to the company's investors. The confidence level is not at the maximum because the market's reaction can be unpredictable and may also depend on the company's response to the allegations.