In many ways it's a pointless question. Even if we could identify the turning point in the market with a high level of certainty, there are very few people with the courage to enter at these low points.

The more important thing to look for are the features that will help to identify, first, the end of the market fall and second, the development of a market recovery. These two events may be separated by a few months, or by many months.

There are two important features that identify climax selling. The first is the rapid acceleration in the speed of the market fall. Like a Stuka dive-bomber, the market first rolls over slowly and then plunges in a vertical dive. This is fear at work.

The second feature is a massive increase in volume. This is panic. Ordinary people are desperate to get out of the market. Generally the funds and institutions got out of the long-side of the market many months ago. The selling in January and February was dominated by institutions and funds. The current panic selling is thousands of small orders from retail investors desperate to get out of the market.

During the bear market collapse, volumes decline. Fewer people want to buy stock so volatility increases because small trades have a disproportionate impact in a shallow market.

This selling climax shakes out all the weak hands in the market. It kills the margin speculators. It wipes out those who have finally lost patience. It removes the speculative money in the market because people think the risk is too great. This is also called capitulation. Everybody gives up – and it influences the thinking of a generation. My parents, who lived through the depression, could never entirely shake the idea that the market was a dangerous place.