[257]

X was started as a product shipped to India in the 18th century, under the control of the British East India Company. It originated to combat the long and harsh conditions of sea voyage in which other products would turn stale or sour. This was done by adding in high quantity a member of the Cannabaceae family of flowering plants, which also gave it a bitter (though acquired) taste.
What am I talking about?

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India Pale Ale
It is a type of beer with high hops content, and bitter in taste.
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[234]

X was an informal list of about 4 dozen large-cap stocks on the New York Stock Exchange that were most favored by institutional investors in the 1960s and 1970s. These included American Express, Coca Cola, IBM, Pfizer, among others.
However today, the term X is mostly associated with the Indian stock market.
Can you identify X?

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Nifty Fifty.
In India NIFTY 50 is a benchmark Indian stock market index that represents the weighted average of 50 of the largest companies listed on the National Stock Exchange.
Read More about the original Nifty Fifty.
Read More about the today's NIFTY 50.

[126]

How is this imaginary fish related to the world of finance?
red fish

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Draft Red Herring Proposal, a document filed by a company that intends to issue an initial public offering (IPO) in India. The document is named after an expression which means to mislead, which in turn is named after a non-existent fish.
Read More about the original expression.