P/E ratio for National Grid (NGG)

P/E ratio history for National Grid from 2005 to 2009

PE ratio at the end of each year

P/E ratio for similar companies or competitors

Company	P/E ratio	P/E ratio differencediff.	Country
NiSource NI	22.7	N/A	🇺🇸 USA
Consolidated Edison ED	12.8	N/A	🇺🇸 USA
DTE Energy DTE	19.9	N/A	🇺🇸 USA
Sempra Energy SRE	22.1	N/A	🇺🇸 USA
TC Energy TRP	66.8	N/A	🇨🇦 Canada
BP BP	3.37	N/A	🇬🇧 UK
Unitil Corporation UTL	20.0	N/A	🇺🇸 USA

How to read a P/E ratio?

The Price/Earnings ratio measures the relationship between a company's stock price and its earnings per share. A low but positive P/E ratio stands for a company that is generating high earnings compared to its current valuation and might be undervalued. A company with a high negative (near 0) P/E ratio stands for a company that is generating heavy losses compared to its current valuation.

Companies with a P/E ratio over 30 or a negative one are generaly seen as "growth stocks" meaning that investors typically expect the company to grow or to become profitable in the future.
Companies with a positive P/E ratio bellow 10 are generally seen as "value stocks" meaning that the company is already very profitable and unlikely to strong growth in the future.