May be associated with the presence of sodium in drinking water when present in high concentrations. Often from saltwater intrusion, mineral dissolution, industrial and domestic waste. Deteriorates plumbing, water heaters, and municipal water-works equipment at high levels.
Cost basis is the original price paid for shares of a security plus or minus certain adjustments required by applicable tax rules such as adjustments with respect to reinvested distributions and sales charges.
The average cost basis method adds up the cost basis for the entire position in a specific mutual fund and divides it by the total number of fund shares owned to arrive at an average cost per share. The average cost is then compared with the price at which the fund shares were sold to determine gains or losses. The average cost basis is one of three methods that the IRS allows investors to use to arrive at the cost of their mutual fund holdings acquired before Jan. 1, 2012.