NEW YORK. Oft. 31 (ADÛÓProfit taking scrambled stock market prices today as the list topped out two days of vigorous advance. Tlie market ended the month of October with a fair coin.</br></br>The latest rallying phase of the market blotted out the sharp mid-October decline which had some Wall Streeters harking back to the nervous day which preceded the May 28 stock break.</br></br>The Dow Jones industrial average, thanks to plus signs among some of the pivotal blue chips that compose it, nudged upward .71) to 580.77. This left the Dow with a net gain of 10 79 for the month of October.</br></br>The more comprehensive 500 - stock Standard & PoorÛªs index today eased .02 to 5(1.52, giving ths barometer a net gain of .25 on the month.</br></br>Trading was moderately brisk in the morning but faded to a walk thereafter, putting volume at 3.09 million shares compared with 3.83 million yesterday.