I have made it easy for beginner to understand
P/E ratio simply means how much money you are paying to generate 1% returns.
For Example: If a share is quoting at P/E 25, it means you are paying Rs 25 to earn 1 from that company.
(1/n)
Let us explore
Imagine u purchased RBI Bond with an interest of 7.75%.
It means you pay 100 & u get ₹ 7.75 as interest credited in your bank account (2/n)
In our GOI bond’s case: Market Value is ₹ 100 and Earning is ₹ 7.75
P/E ratio = 100 / 7.75 = 12.90
12.90 is the benchmark to compare whether markets are overvalued or undervalued.
(3/n)
When invested in markets, taking risk of uncertainty, I shall get more than RBI Bonds returns a.k.a risk free returns.
Equity Returns [ 100/ Market P/E ] >Risk free return
By re-arranging the above. Market P/E < [100/RISK Free]
(4/n)
The above calculation is for Current/Historic PE ratio, I am of the opinion that while investing today v s'd incorporate expected earnings growth.
Market P/E<[ 100/ (Risk Free–Dividend Yield)]x(1+earnings growth)
(6/n)
Fair Market Valuation = 17.23
In the above equation, Risk Free Interest rate is considered as 7.75% RBI Bonds, dividend yield as 1.25 and expected growth from equities at 12%
If market P/E is > fair market valuation, (7/n)
Increase your allocation to equities when NIFTY 50 PE ratio is below fair PE (Yellow Line) & its a screaming buy when it is 2 STDEV below the fair price like in 2008-2009
(9/n)
Have any questions happy to address those.............