What It Is. An IgA test measures the blood level of immunoglobulin A, one of the most common antibodies in the body. Antibodies are proteins made by the immune system to fight bacteria, viruses, and toxins. IgA is found in high concentrations in the body's mucous membranes, particularly the respiratory passages and gastrointestinal tract, as well as in saliva and tears. IgA also plays a role in allergic reactions.
The highest recorded closing of the Dow Jones Industrial Average, as of 2015, is 18,312.39, according to FedPrimeRate.com. The DJIA crossed the 18,000 mark for the first time in December, 2014, and reached its current record in May, 2015. Continue Reading.
The following is a list of the milestone closing levels of the Dow Jones Industrial Average. 1-point increments are used up to the 50-point level; 5 to 100; 10 to 500; 20 to 1,000; 50 to 2,000; 100 to 10,000; and 200-point increments thereafter. Additional milestones may be used if necessary. 1929â1949: Bear market. 2  The stock market crash of 1929 precedes the Great Depression. 3  The Dow plunges to 41.22 (theoretical intra-day low of 40.56) on July 8, 1932, thus erasing 33 years of gains, in just under three years.