Answer:
Contrarian
Explanation:
In this case, Petulia is following the contrarian investment style. Those who follow this style, invest contrary to prevailing market trends (hence the name), by buying when other are selling, and selling when others are buying.
Petulia is a contrarian because instead of selling stock during the downward trend, she opted to buy stock instead, hoping for a rise in the market in the short, or in the long-term.