Warren Buffett has been waiting for a major stock correction for years. In recent years, the Oracle of Omaha has been hoarding cash. It was an indication that he saw a massive stock market correction ahead. Now that the crash is here, why hasnât he moved?

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What is Buffett up to?
Like any other major investor, Warren Buffettâs investments must be declared to the public via regular filings. The Securities and Exchange Commission (SEC) requires public disclosures from major investment companies. These indicate that Buffett has made some minor moves in recent weeks as the market collapsed.Â
He sold most of his stake in Americaâs major airlines. Buffett had been steadily building up positions in all major air carriers in the country. The increased efficiency of aircrafts as well as the steady price of oil may have attracted his attention.
However, the global pandemic has challenged the industry like never before. It appears that the prospects were too bleak for Buffett to hold.Â
The Oracle has also been raising debt. He issued a European bond to raise âŹ3 billion ($4.6 billion) at 0%. He also raised 195.5 billion yen ($2.56 billion) through a debt offering in Japan. Effectively, heâs taking free money in currencies he expects to depreciate against the U.S. dollar.Â
While these are sophisticated moves youâd expect from the most celebrated investor in the world, itâs not newsworthy. After all, the investment giant Buffett owns had $128 billion in cash going into this crisis. Now that war chest must be bigger with all the stakes heâs sold and debt heâs issued. Â
Buffett hasnât done a multi-billion dollar deal to take a major company private. He isnât buying huge stakes in any public companies either. Regular, non-billionaire investors like us should probably wonder why.  Â
Why heâs cautious
One possible reason for Buffettâs anxiety could be the quick rebound in stocks this month. The Canadian TSX Index has recovered 24% since hitting bottom on March 23. Buffettâs favourite Canadian stocks Restaurant Brands and Suncor Energy have also recovered some of their losses.Â
However, the stock market may have moved back into âovervaluedâ territory. At the time of writing, the value of the Canadian stock market is 100% of gross domestic product (GDP). This measure is called the âBuffett Indicator.â However, GDP is certainly going to fall this year, so stocks are arguably overvalued.Â
The U.S. stock market seems even more overvalued by this metric, which could be why Buffett hasnât made a major acquisition or noteworthy move yet. I believe this is a red flag for average investors like us. If Buffett canât see value, perhaps we should be holding some cash too.Â
Foolish takeaway
Stocks have quickly rebounded from their lows. Now, the market is trading at fair value based on last yearâs earnings. However, with a severe recession ahead, earnings are likely to decline, which means stocks are overvalued.Â
Warren Buffett is still hoarding cash and hasnât made a major acquisition yet, which could be the clearest indication that investors like us need to be more patient for better opportunities ahead.Â