Units for stock indexes


When reading Japanese financial news, I found that different units were used
for different stock indexes. [For
example](https://www.fnn.jp/articles/-/79084), ドル／セント was used for Dow Jones
Industrial Average, while ポイント was used for NASDAQ Composite. (Emphasis mine)

> 結局、 **ダウ工業株30種平均** の終値は、前の日より、 **161ドル60セント** 高い、 **2万8,653ドル87セント**
> と続伸し[...]
>
> 一方、ハイテク株主体の **ナスダック総合指数** は反発し、 **70.29ポイント** 上がって、1万1,695.63と[...]

Why are different units used to describe the different indexes? Why is Dow
described in dollar, and NASDAQ in point?

This is different from English's terminology, where [point was used for
Dow](https://www.thestreet.com/markets/stock-market-dow-jones-industrial-
average-federal-reserve-082820).

My initial guess is that the weighing method has something to do with the
units used. Dow is [price-weighed](https://en.wikipedia.org/wiki/Price-
weighted_index) where NASDAQ is [market cap-
weighed](https://en.wikipedia.org/wiki/Capitalization-weighted_index). But I
could not work out how this leads to different units being used.

