The positive preliminary revenue results for Q4 and the full year of 2023 suggest that DexCom is performing well financially, which typically leads to increased investor confidence and can drive the stock price up. The issuance of positive guidance for 2024 further strengthens investor sentiment, suggesting that the company expects continued growth and financial health. This news is directly related to DexCom and is of high importance to investors, as revenue figures and future guidance are critical factors in evaluating a company's performance and potential.