Recently, I've seen many discussions about VIX, especially as everyone watches it during stock market volatility. To be honest, the US Fear Index is definitely worth understanding well because it can help you read the true market sentiment.

First, let's briefly explain what VIX is. This index is called the Volatility Index, created by the Chicago Board Options Exchange in 1993, used to measure investors' expectations of the S&P 500's volatility over the next 30 trading days. Simply put, the higher the VIX value, the more panic there is in the market; the lower the value, the more stable and optimistic the market is.

I've noticed many people tend to misunderstand this. VIX is not a tool to predict whether stocks will go up or down, but rather reflects the market's expectation of volatility. When the stock market crashes, investors usually buy options to protect themselves, which pushes the VIX higher. Conversely, when the market is calm, the VIX tends to decline. This inverse relationship seems simple, but in actual practice, surprises often occur.

Looking at historical data, the US Fear Index performs especially noticeably during major events. During the 1997 Asian financial crisis, the 2008 financial crisis, and the 2020 pandemic outbreak, VIX spiked to extreme levels. Particularly in 2008, the VIX approached 80, which truly reflected extreme market panic. Interestingly, VIX is also sensitive to US elections, often rising before elections, reflecting investors' concerns about political uncertainty.

Regarding practical applications of VIX, many think of hedging. Indeed, when market volatility is expected to increase, VIX futures, VIX options, or related ETF products can serve as protection. Products like VXX, VIXY, and UVXY are often used as hedging tools during major market drops. However, it's important to note that these products involve futures rolling, which can lead to value decay over the long term.

I believe the most practical use of VIX is as a barometer of market sentiment. When VIX suddenly surges, it usually indicates significant uncertainty in the market, worth paying attention to. Conversely, when VIX remains low for a long time, it might suggest the market is overly optimistic, and risk management should be considered. Data shows that a rapid rise in VIX combined with a stock market decline often signals that the downward trend is nearing its bottom, which can help in timing buy-ins.

But it's important to clarify that the US Fear Index has limitations. It mainly reflects the volatility expectations of the S&P 500, so it may not be as accurate for the Dow Jones or NASDAQ indices. Also, VIX reflects volatility expectations, not market direction, so it cannot be used directly to predict whether stocks will rise or fall.

Recently, market opinions on VIX have been somewhat contradictory. On one hand, Fed policies, geopolitical risks, and corporate earnings all carry uncertainties, but VIX has been fluctuating between 12 and 20, appearing quite calm. This might indicate that the market has already priced in some risks, or that investor sentiment is relatively stable. However, no one can say how long this calm will last.

If you want to participate in VIX investing, the simplest way is to buy and sell related ETF or ETN products, which trade similarly to stocks. But remember, these are not meant for long-term holding; they are more suitable for short-term hedging or capturing volatility opportunities. In any case, understanding VIX is a must for stock investors, as it can help you better see the underlying emotional shifts in the market.