Does this Nikkei valuation graph not look like a massive pump and dump or am I missing something? https://www.marketwatch.com/investing/index/nik?countrycode=j

Does this Nikkei valuation graph not look like a massive pump and dump or am I missing something? https://www.marketwatch.com/investing/index/nik?countrycode=jp https://www.marketwatch.com/investing/index/nik?countrycode=...