The most common and most likely answer to this crossword clue is the 9 letter word RIVERBOAT
I've seen this crossword clue in Financial Times
R
I
V
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B
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A
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More clues leading to the result RIVERBOAT
Buddy explains!
The straight part
We know that "A floating asset moving between banks" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a floating asset moving between banks = riverboat.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does RIVERBOAT mean?
RIVERBOAT noun- A watercraft designed for operating on rivers.