C. Altavilla, D. Giannone, and M. Lenza, The Financial and Macroeconomic Effects of the OMT Announcements, International Journal of Central Banking, vol.12, pp.29-57, 2016.

S. Ambler and F. Rumler, The effectiveness of unconventional monetary policy announcements in the euro area: an event and econometric study, 2017.

P. D. Azar and A. W. Lo, The Wisdom of Twitter Crowds: Predicting Stock Market Reactions to FOMC Meetings via Twitter Feeds, Journal of Portfolio Management, vol.42, p.123, 2016.

L. Bocola and A. Dovis, Self-Fulfilling Debt Crises: A Quantitative Analysis, 2016.

J. Bollen, H. Mao, and X. Zeng, Twitter mood predicts the stock market, Journal of computational science, vol.2, issue.1, pp.1-8, 2011.

. Bruegel, The SMP is dead. Long live the OMT, 2012.

G. A. Calvo, Servicing the public debt: The role of expectations". The American Economic Review, pp.647-661, 1988.

H. L. Cole and T. J. Kehoe, A self-fulfilling model of Mexico's 1994-1995 debt crisis, Journal of international Economics, vol.41, pp.309-330, 1996.

, Self-fulfilling debt crises, The Review of Economic Studies, vol.67, issue.1, pp.91-116, 2000.

G. Corsetti, The mystery of the printing press, 2015.

G. Corsetti and L. Dedola, The mystery of the printing press: Monetary policy and self-fulfilling debt crises, Journal of the European Economic Association, vol.14, pp.1329-1371, 2016.

S. D'amico, Discussion of 'The Financial and Macroeconomic Effects of the OMT Announcements, International Journal of Central Banking, vol.12, pp.59-68, 2016.

D. Grauwe, P. , and Y. Ji, Mispricing of sovereign risk and macroeconomic stability in the Eurozone, Journal of Common Market Studies, vol.50, pp.866-880, 2012.

D. Cesare, G. Antonio, M. Grande, M. Manna, and . Taboga, Recent estimates of sovereign risk premia for euro-area countries, 2013.

. Ecb, Introductory statement to the press conference (with Q&A), 2012.

, Introductory statement to the press conference (with Q&A), 2012.

E. País, Draghi says ECB buying short-term bonds does not breach EU Treaty, 2012.

M. Falagiarda and S. Reitz, Announcements of ECB unconventional programs: Implications for the sovereign spreads of stressed euro area countries, Journal of International Money and Finance, vol.53, pp.276-295, 2015.

R. Fendel and F. Neugebauer, Country-specific Euro area government bond yield reactions to ECB's non-standard monetary policy announcements, 2018.

V. Gholampour, What Can We Learn from Stock Market Tweets?, 2017.

V. Gholampour and E. Van-wincoop, What can we Learn from Euro-Dollar Tweets?, 2017.

S. Hansen and M. Mcmahon, Shocking language: Understanding the macroeconomic effects of central bank communication, Journal of International Economics, vol.99, pp.114-133, 2016.

S. Hansen, M. Mcmahon, and A. Prat, Transparency and deliberation within the FOMC: a computational linguistics approach, The Quarterly Journal of Economics, 2014.

A. Krishnamurthy, S. Nagel, and A. Vissing-jorgensen, ECB policies involving government bond purchases: Impact and channels, Review of Finance, vol.22, pp.1-44, 2017.

, Il y a cinq ans, Draghi sauvait l'euro en une phrase, Les Echos, 2017.

A. Meinusch and P. Tillmann, Quantitative Easing and Tapering Uncertainty: Evidence from Twitter, International Journal of Central Banking, vol.13, pp.227-258, 2017.

F. Roch and H. Uhlig, The Dynamics of Sovereign Debt Crises and Bailouts, Journal of International Economics, vol.114, pp.1-13, 2018.

C. Scotti, Surprise and uncertainty indexes: Real-time aggregation of realactivity macro-surprises, Journal of Monetary Economics, vol.82, pp.1-19, 2016.

U. Szczerbowicz, The ECB unconventional monetary policies: have they lowered market borrowing costs for banks and governments?, International Journal of Central Banking, vol.11, pp.91-127, 2015.

. Van-der-heijden, R. Minke, W. Beetsma, and . Romp, Whatever it takes' and the role of Eurozone news, Applied Economics Letters, vol.25, pp.1166-1169, 2018.

X. Zhang, H. Fuehres, and P. A. Gloor, Predicting stock market indicators through twitter "I hope it is not as bad as I fear, Procedia-Social and Behavioral Sciences, vol.26, pp.55-62, 2011.