One of the core topics that I have learned from Graham's 'Intelligent Investor', is simply DO YOUR OWN RESEARCH before investing. A value investing pillar we can all agree on. I have attempted my first ever stock hunt with the principles I have learned. The company that fit my own criteria - Coca Cola Amatil (CCL). My first baby step was the EPS. Since I started I've been using Investing.com and I see the EPS is listed as 0.6. But when I do my own calculation I get 0.42. It wasn't until a bit of further digging I realized my EPS was 'diluted', where as Investing.com was 'basic'. Therefore, my P/E Ratio resulted in 20.71 ($8.40 price/0.42) whilst every financial website seems to show the P/E at ~14. Next on my list was Debt/Equity ratio - this time I looked at CCL's annual report to get the facts myself. I see 'Total Liabilities - $4176.6m' and I calculated myself the 'Shareholders Equity - $1548.9' (and sure enough this number check out on their balance sheet) and solve for x. My result was 2.91. But when I look at Investing.com, I see 'Total Liabilities - $4508m' and a D/E Ratio of 1.51. Naturally, you start to doubt yourself by thinking how the hell these figures are being calculated and maybe you just suck at math. Of course, when evaluating a company, we can only estimate so much and its always an approximation, never a certainty. But for basics like P/E ratio or EPS, what do you do when your calculations don't match that being shown? Is it foolish to cross reference since you have no idea how their figures are calculated? Do you trust the online figures or do you prefer to DYOR?