U.S. stocks typically rebound six months before the economy, but investors worry that the current 25% rally since the market's March 9 low could be a red herring.
At the same time, lack of investor conviction — or simple fear — can be considered a sign of a healthy market.
Reasons to be pessimistic about the economic outlook abound: unemployment is the highest since 1983, house prices are still falling by record amounts and persistent questions remain about which banks will still be in business next year.
Many investors are holding out for clearer signs that the worst financial crisis in generations is over before they commit to jumping back into the stock market. They worry that more bad news awaits in the months ahead to trip up the latest rally.
Declining volume tells part of the technical story. The average total value of stocks traded each day on the Nasdaq has fallen about 40% from 2008 levels so far this year through March.
Wall Street's fear gauge, the CBOE Market Volatility index, also remains stubbornly high, only dipping below 40 in recent sessions despite trading below 30 in more normal times.