Organic food provider Whole Foods Market Inc. (NASDAQ: WFMI) excited investors when it reported positive results for its fiscal fourth quarter; Q4 sales increased 2.3% to $1.8 billion, while income available to common shareholders was $28.7 million, or $0.20 per diluted share, compared to the year-ago quarter’s $1.5 million, or $0.01 per diluted share. These came despite a 0.7% and 2.0% declines in comparable store and identical store sales, respectively, excluding  the negative impact of foreign currency translation. However, WFMI shares were driven lower Thursday on the company’s cautious outlook for its new fiscal year, stating that increased price investments could negatively impact its sales going forward, and with no anticipated positive change in the economy over the short term.