Why Forecasting the Stock Market May Be Even Harder Than Forecasting the Weather

​Courtesy of Fox 13 News, Tampa.

My wife and I were recently planning our day around the weather. Living in Florida, that usually means paying attention to when—not if—the rain will arrive. The funny thing is that we're currently experiencing one of the driest stretches we've seen in what is supposed to be our rainy season.
 
That particular morning, the weather app showed a 45% chance of rain. As the day progressed, however, the forecast kept changing. Forty-five percent became thirty. Thirty became twenty-five. Eventually, the chance of rain dropped all the way to zero.
 
Needless to say, it was disappointing as we had planned our day around a strong chance of rain and doing indoor activities.
 
But it also got me thinking. If meteorologists with satellites, radar systems, supercomputers, and an enormous amount of historical data struggle to predict the weather accurately from one day to the next, how much harder must it be to predict what the stock market will do next?
 
The answer is: much harder.
 
At least weather follows the laws of physics.  Markets, on the other hand, are driven by human beings.
 
The Good Old Days Weren't Necessarily Easier—Just Simpler
 
I have to admit that there was a time when forecasting market direction seemed more straightforward. Investors could focus on fundamentals like earnings, economic growth, interest rates, and valuations. Those factors still matter, but their influence has become increasingly obscured by forces that barely existed a generation ago.
 
The result is a market environment that often appears disconnected from traditional valuation measures and economic reality.
 
Here are four reasons why.
 
1. Politics Has Become a Market Force

​Markets have always reacted to politics, but today politics often seems designed to influence markets.
 
Both political parties understand that voters pay attention to their retirement accounts, investment portfolios, and economic confidence. Strong stock market performance can create a sense of prosperity, even when many underlying economic indicators are mixed.
 
Governments can influence investor sentiment through fiscal spending, tax policy, regulatory changes, trade policy, and public messaging. The result is that market participants must not only forecast corporate earnings and economic conditions but also predict how political leaders will respond to those conditions.
That adds an entirely new layer of uncertainty.
Political incentives don't always align with economic fundamentals. Sometimes policy decisions can temporarily boost markets while creating longer-term consequences that are harder to see in real time.
 
2. Passive Investing Has Changed Price Discovery
 
In last month's article, I discussed the explosive growth of passive investing through index funds and retirement plans. See the Robots are Coming!
 
This trend has fundamentally altered how capital flows into markets.
 
According to data from Morningstar and the Investment Company Institute (ICI), passive strategies now hold a larger share of U.S. fund assets than actively managed strategies. Every payday, millions of workers automatically direct money into 401(k) plans that then flow into index funds regardless of valuation.
 
The process is largely automatic.
 
A company's stock may receive substantial buying pressure not because investors have concluded it is undervalued, but simply because it is included in a major index and receives a proportionate share of incoming funds.
 
This can reduce the market's ability to accurately reflect fair value.
 
Traditional valuation metrics such as price-to-earnings ratios, dividend yields, or book values still provide useful information, but they often appear less influential than they were decades ago. When massive quantities of money are invested automatically, market prices can remain disconnected from fundamental value for much longer periods than investors expect.
 
3. Central Bank Liquidity Matters More Than Many Realize
 
If there is one lesson investors have learned over the past two decades, it is that liquidity matters.
 
A great deal.
 
Following the financial crisis of 2008 and again during the pandemic, central banks around the world injected extraordinary amounts of liquidity into financial systems. Researchers at the Bank for International Settlements (BIS), the Federal Reserve, and other institutions have documented how liquidity conditions can significantly affect asset prices.
 
When money is abundant, investors tend to take more risk. Stocks, bonds, real estate, and alternative assets often rise together.
 
When liquidity contracts, the opposite can happen.
 
This has led many market professionals to focus less on traditional economic indicators and more on questions such as:

• Is central bank liquidity expanding or contracting?
• Are financial conditions easing or tightening?
• Is credit becoming more available or less available?

 
Markets today often react as much—or more—to liquidity conditions than they do to earnings growth or valuation levels.
 
That makes forecasting significantly more complicated because liquidity itself is influenced by monetary policy, government borrowing, banking activity, and international capital flows.
 
4. Speculation Has Become Mainstream
 
Perhaps the biggest change of all is the sheer number of participants now involved in financial markets.
 
Technology has dramatically lowered the barriers to entry. Trading apps, social media, financial podcasts, online influencers, and twenty-four-hour financial news networks have brought investing into everyday life.
 
This democratization of investing has many benefits. More people have access to wealth-building opportunities than ever before.
 
However, it has also increased speculative behavior.
 
Entire market narratives can emerge and spread globally within hours. Trending stocks can attract massive inflows of capital regardless of business fundamentals. Meme stocks, cryptocurrency booms, options speculation, and social-media-driven trading all demonstrate how investor psychology can exert an outsized influence on prices.
 
Human behavior has always mattered in markets.
 
Today, it travels at the speed of the internet.
 
What This Means for Investors
 
None of this means investing is impossible. Far from it.
 
History suggests that disciplined investors who stay focused on long-term objectives generally have better outcomes than those who constantly react to headlines.
 
However, it does mean that forecasting markets may be more difficult today than at any point in modern history.
 
 
Investors are trying to predict the interaction of political incentives, passive investment flows, central bank liquidity, economic data, corporate earnings, technological disruption, and human psychology, all at the same time.
 
That is an incredibly complex puzzle.
 
Which brings me back to the weather.
 
The meteorologists weren't wrong because they lacked intelligence, experience, or sophisticated tools. They were trying to predict a complex system influenced by countless variables.
 
The stock market is no different.
 
Except instead of clouds and wind patterns, we're dealing with governments, central banks, corporate executives, institutional investors, algorithms, and millions of individual market participants all making decisions simultaneously.
 
If forecasting the weather is difficult, forecasting the stock market may be nearly impossible.
 
Why Professional Oversight Matters

This is precisely why investors need someone actively supervising their investments.
 
Not because anyone can consistently predict the future, but because someone should be monitoring changing conditions, evaluating risks, and making adjustments when circumstances warrant.
 
Sometimes that means tactically rotating among sectors or asset classes. Sometimes it means reducing risk exposure. And sometimes it may even mean raising significant cash positions when conditions become especially challenging.
 
Our view is that forecasting markets is not going to get easier from here. In fact, it may become even more difficult as investors potentially face a future characterized by lower long-term returns and higher volatility than what many experienced during the extraordinary bull market of the past decade.
 
In an environment like that, disciplined portfolio management becomes more important—not less.
 
If you'd like a second set of eyes on your portfolio, we'd be happy to help. Why not get a complimentary second opinion on your investments?
 
After all, while no one can control the weather or perfectly predict the markets, you can control how prepared you are for whatever comes next.