Phase III clinical trials. The Dow (as reported by the UPI) closed over 30,000 on December 31, 2020, at a record 30,606.48. On November 24, following news that the presidential transition of Joe Biden was approved, the Dow increased by more than 500 points, closing at 30,046.24. Calculation To calculate the DJIA, the sum of the prices of all 30 stocks is divided by a divisor, the Dow Divisor. The divisor is adjusted in case of stock splits, spinoffs or similar structural changes, to ensure that such events do not in themselves alter the numerical value of the DJIA. Early on, the initial divisor was composed of the original number of component companies; this initially made the DJIA a simple arithmetic average. The present divisor, after many adjustments, is less than one (meaning the index is larger than the sum of the prices of the components). That is: where p are the prices of the component stocks and d is the Dow Divisor. Events such as stock splits or changes in the list of the companies composing the index alter the sum of the component prices. In these cases, in order to avoid discontinuity in the index, the Dow Divisor is updated so that the quotations right before and after the event coincide: the Dow Divisor is 0.15172752595384 and every $1 change in price in a particular stock within the average equates to a 6.590761918 (1 ÷ 0.15172752595384) point movement. Assessment Issues with market representation With the inclusion of only 30 stocks, critics such as Ric Edelman argue that the DJIA is an inaccurate representation of overall market performance compared to more comprehensive indexes such as the S&P 500 Index or the Russell 3000 Index. Additionally, the DJIA is criticized for being a price-weighted index, which gives higher-priced stocks more influence over the average than their lower-priced counterparts, but takes no account of the relative industry size or market capitalization of the components. For example, a $1 increase in a lower-priced stock can be negated by a $1 decrease in a much higher-priced stock, even though the lower-priced stock experienced a larger percentage change. In addition, a $1 move in the smallest component of the DJIA has the same effect as a $1 move in the largest component of the average. For example, during September–October 2008, former component AIG's reverse split-adjusted stock price collapsed from $22.76 on September 8 to