The stock price of QCR Holdings, Inc. is trading higher, which indicates a positive investor reaction to the Q4 financial results despite them being mixed. This suggests that the positive aspects of the report outweighed the negatives in the short term. The movement in stock price is directly related to the earnings report, making it highly relevant and important to investors. The confidence score is high due to the clear cause-and-effect relationship between earnings reports and stock price movements, although not at 100 because the 'mixed' nature of the results could introduce some volatility.