Editing Economic bubble (section)

===Equity bubble===
An [[Equity (finance)|equity]] bubble<ref>{{Cite web |url=https://www.investopedia.com/articles/stocks/10/5-steps-of-a-bubble.asp |title=5 Stages of a Bubble}}</ref> is characterised by tangible investments and the unsustainable desire to satisfy a legitimate market in high demand. These kind of bubbles are characterised by easy liquidity, tangible and real assets, and an actual innovation that boosts confidence. The injection of funds into the business cycle is capable of accelerating the innovation process and propelling faster productivity growth.<ref>{{cite journal | last1=Brown | first1=James R. | last2=Martinsson | first2=Gustav | last3=Petersen | first3=Bruce C. | title=What promotes R&D? Comparative evidence from around the world | journal=Research Policy | volume=46 | issue=2 | date=2017 | doi=10.1016/j.respol.2016.11.010 | pages=447–462}}</ref><ref>{{cite journal | last1=Brown | first1=James R. | last2=Fazzari | first2=Steven M. | last3=Petersen | first3=Bruce C. | title=Financing Innovation and Growth: Cash Flow, External Equity, and the 1990s R&D Boom | journal=The Journal of Finance | volume=64 | issue=1 | date=2009 | issn=0022-1082 | doi=10.1111/j.1540-6261.2008.01431.x | pages=151–185}}</ref><ref>{{cite journal | last1=Acharya | first1=Viral | last2=Xu | first2=Zhaoxia | title=Financial dependence and innovation: The case of public versus private firms | journal=Journal of Financial Economics | volume=124 | issue=2 | date=2017 | doi=10.1016/j.jfineco.2016.02.010 | pages=223–243| url=http://www.nber.org/papers/w19708.pdf }}</ref> Three instances of an equity bubble are the [[Tulip Mania]], the [[cryptocurrency bubble]], and the [[dot-com bubble]].{{cn|date=December 2023}}