The New York equities markets were up at midday on Friday and looked ready to close the week out with gains as well. The Dow Jones Industrial Average was 0.4 percent higher to 12,466.99, a gain of 1.3 percent on the week. Earlier in the session, the Dow was as high as 12,486.30, a new high. The Nasdaq Composite had added 0.5 percent so far on the day, to 2,466.12, a gain of 1.2 percent on the week. Meanwhile, the S&P 500 was up 0.3 percent to 1,430.11, 1.4 percent higher this week.

Airlines saw gains during the week. United Air Lines and Continental Airlines both gained share value on the news that United is talking to Continental about a merger. United added 4.8 percent to $45, while Continental gained 7.1 percent to $44.96. Meanwhile, Midwest Airlines was 27.8 percent higher to $11.82 after rejecting an offer from AirTran Holdings.

In the semiconductors sector, Advanced Micro Devices added 6.7 percent to $22.34 after it said that it expected demand to rise by 10 percent next year.

Microsoft added 2.4 percent to $30.12, the first time its share price rose above $30.12 since November 2004. Elsewhere in the software sector, Adobe added 10.3 percent during the week to $42.89 on a fourth-quarter report that was better than had been expected.

Losers included Best Buy, which dropped 4.8 percent to $50.60 on a downgrade from Prudential Securities.

Some securities brokers also saw declines. Lehman Brothers dropped 1.4 percent to $75.98 and Goldman Sachs fell 1.8 percent to $201.32. The sector was mixed, however, with Bear Stearns adding 2.6 percent to $1.63.

Wall Street was slightly higher at mid-session on Wednesday. The Dow Jones Industrial Average had added 0.1 percent to 12,329.28 but was well down from the new record high of 12,368.61 it reached earlier in the day. Meanwhile, the Nasdaq Composite was up a bare 0.02 percent to 2,432.03 and the S&P 500 had gained 0.2 percent to 1,414.26. The small and mid-cap Russell 2000 index was 0.08 percent higher to 789.01.

Airlines were higher after United Airlines said that it has opened talks with Continental Airlines concerning the possibility of a merger. United was 4.5 percent higher to $45.54, while Continental gained 5.2 percent to $45.11. Elsewhere, the news that AirTran Holdings’ bid for Midwest Air had been rejected sent Midwest 21.26 percent higher to $11. AirTran added 1.5 percent to $12.53.

The retail sector was mixed. Home Depot added 1.3 percent to $39.22 on the news that it has acquired 12 stores in China. Best Buy and Circuit City both declined, however, after Prudential Securities issued a downgrade on both consumer electronics retailers on worries about the low price of flat-screen televisions. Circuit City dropped 1.4 percent to $23.24, while Best Buy was 1.5 percent lower to $50.51.

Anadarko Petroleum fell 3 percent to $46.19 after Goldman Sachs dropped its rating on the oil company from “buy” to “neutral”.

A broker upgrade helped Apple Computer to a 1.9 percent gain to $87.80. Morgan Stanley kept its recommendation for the computer maker at “overweight”, but upped its target share price from $90 to $110 on the theory that revenues could be increased by the introduction of new products.