Gavrilo Princip assassinated Archduke Franz Ferdinand of Austria and his wife - which led to events that led to World War I.
According to Standard & Poor's Dow Jones Indices, the $2.08 trillion that was wiped off global equity markets on Friday was the biggest daily loss ever - topping the Lehman Brothers bankruptcy during the 2008 financial crisis and the Black Monday stock market crash of 1987.
And following the market chaos, a bunch of analysts sent out negative and ominous notes with key words like "recession," "contagion," and "stagflation."
Notably, this emotional response to a political shock is actually quite typical of investor (or, more broadly, human) behavior. Geopolitical events tend to make traders and investors nervous, which then sometimes leads to volatility in financial markets.
However, as history has shown time and time again, these events generally do not have a sustained impact on markets.
Credit Suisse's Head of Research and Deputy Global CIO Giles Keating and his team reviewed data last June on major geopolitical events in the last 100-plus years and found that stocks generally bounced back up after these shocks.
"The large majority of individual major events - ranging from the assassination of Archduke Ferdinand 100 years ago through to 9/11 and recent events in Iraq and Ukraine - impact major stock markets by around 10% or less, with the effect being fully reversed within a month or so," he wrote in a note to clients.
"This suggests that the most profitable strategy has usually been the contrarian one of buying into price falls caused by such incidents," Keating wrote.
Furthermore, in light of the Brexit vote, another Credit Suisse research team led by Andrew Garthwaite recently shared a chart showing what the Hang Seng looked like in the immediate and long-term following the Tiananmen Square protests.
"In our experience, markets tend to over-react to political shocks, as was seen in the example of Tiananmen Square - where the Hang Seng fell 22% in a single day, losing 37% from its peak over the entirety of the protest period, before steadily recovering back to previous peak over the following year," the team wrote.
Credit Suisse
True, there have been a several times that markets didn't recover as quickly after seismic geopolitical events such as the invasion of France in 1940 and the Yom Kippur War (which led to a complete realignment of control over global oil).
But even then stocks saw recoveries within 2-3 years, as Credit Suisse's Keating previously pointed out.
Notably, Warren Buffett also champions the stay-calm-when-all-hell-goes-loose strategy. At the absolute height of the financial crisis, he wrote in a New York Times:
"Over the long term, the stock market news will be good. In the 20th century, the United States endured two world wars and other traumatic and expensive military conflicts; the Depression; a dozen or so recessions and financial panics; oil shocks; a flu epidemic; and the resignation of a disgraced president. Yet the Dow rose from 66 to 11,497."
And, as an interesting side note, Napoleon - someone who literally changed the global geopolitical order - defined "military genius" as "a man who can do the average thing when all those around him are going crazy."
As some have pointed out, the same can be said of investing.
JP Morgan Asset Management
How Warren Buffett sees the stock market.