Mumbai, May 20 (IANS): Key Indian equity markets on Friday opened on a flat note during the early morning trade session.

The wider 51-scrip Nifty of the National Stock Exchange (NSE) edged down by 5.10 points or 0.07 percent, at 7,778.30 points.

Conversely, the barometer 30-scrip sensitive index (Sensex) of the BSE, which opened at 25,428.42 points, traded at 25,437.08 points (at 9.30 a.m.) -- up 37.36 points or 0.15 percent from the previous close at 25,399.72 points.

The Sensex has so far touched a high of 25,498.95 points and a low of 25,379.75 points.

In contrast, the BSE market breadth was skewed in favour of the bulls -- with 642 advances and 615 declines.

Both the key Indian indices had ended in the red during the previous trade session on Thursday, due to negative global cues, profit booking and a fall in crude oil prices.

The barometer index had fallen by 304.89 points or 1.19 percent, while the NSE Nifty had edged down by 86.75 points or 1.10 percent.