The type of money that adds to the volatility of emerging markets because it can be quickly withdrawn from its investment is known as "hot money" or short-term speculative investment.
This type of investment is typically made with the intention of making a quick profit, and as such, can be easily moved in and out of markets. This can cause instability and volatility in emerging markets, as sudden outflows of hot money can lead to currency fluctuations and stock market crashes. Therefore, it is important for investors to carefully consider the impact of their investment decisions on the stability of emerging markets.