Now that we are getting towards the business end of April, it might be a good chance to take stock and check out the Westpac Banking Corp (ASX: WBC) share price.
As a big four ASX 200 bank, Westpac is one of the largest and most widely-held ASX shares on the market.
So as it currently stands, Westpac shares closed on Wednesday trading at $23.45 each, down a nasty 1.88% for the day. This places the Westpac share price 8.26% higher so far in 2022, a significant outperformance of the S&P/ASX 200 Index (ASX: XJO).
But over the past 12 months, Westpac's performance hasn't been quite as impressive. Since April 2021, Westpac shares have lost 7.31% of their value. The bank is still well in the red over the past five years, too, having gone backwards by a significant 33% or so over this period.
So that might lead some investors to wonder if the Westpac share price is cheap or expensive right now.

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Are Westpac shares cheap compared to the other ASX 200 banks?
Well, let's see how this ASX 200 bank is being priced compared to its peers. The price-to-earnings (P/E) ratio is a useful metric to employ when comparing the valuations of mature companies in the same sector.
Right now, Westpac shares have a P/E ratio of 17.57, meaning that investors are willing to pay $17.57 for every $1 of earnings the bank brings in. This tells us that, on a raw dollar-to-dollar earnings comparison, investors are valuing Westpac shares at a higher price than Australia and New Zealand Banking Group Ltd (ASX: ANZ). ANZ shares currently trade with a P/E ratio of 13.53.
However, investors are giving Westpac shares an almost identical premium to fellow bank National Australia Bank Ltd (ASX: NAB). NAB currently has a P/E ratio of 17.61, just a tad higher than Westpac's own.
But Westpac can't shine a light on Commonwealth Bank of Australia (ASX: CBA) shares. CBA commands a clear premium for ASX bank investors. In CBA's case, investors are willing to pay $19.80 for every $1 of CBA's earnings.
So right now, Westpac shares are cheaper than CBA and NAB on a P/E ratio basis but more expensive than ANZ.