For example, if an investor in a 25% tax bracket had $10,000 in long-term capital gains, there would be a tax liability of $1,500. If the same investor sold underperforming investments carrying $10,000 in long-term capital losses, the losses would offset the gains, resulting in a tax liability of 0. If the same losing investment were brought back, then a minimum of 30 days would have to pass to avoid incurring a wash sale. 
The financial statements that summarize a large company's operations, financial position and cash flows over a particular period are concise and consolidated reports based on thousands of individual financial transactions. As a result, all accounting designations are the culmination of years of study and rigorous examinations combined with a minimum number of years of practical accounting experience.