Read the following paragraph and determine if the hypothesis is true:

ZURICH, June 24 (Reuters) - Shares in Syngenta were seen rising 5-10 percent on Tuesday following a Bloomberg report saying Monsanto had considered buying the Swiss agrochemicals company, traders said. A spokesman for Syngenta was not immediately available for comment. (Reporting by Alice Baghdjian; editing by Blaise Robinson)

Hypothesis: The shares rose because they had dropped previously
It's impossible to say