I would say that since the panic sell of the 23rd, some players are looking at the PE and convince themselves to buy on dips as the PE looks attractive. This strategy could be a bear trap, the reality is that all current E of the PE are just guesses, reporting on the 1st quarter can well show that the guesses are overestimated, if not, the 2nd quarter will almost certainly show that. There are a few recession-proof sectors that might be worth investing in at this point, but as far as the main indices go, I do think that the bottom is yet to be seen. Unless there is some medical development such as a vaccine, a cure or even a test to show which of us have the natural resistance to the virus, the economy is likely to get worst and this will be fully reflected in the 2nd quarter reporting. Until then you are gambling not investing.
It is to be noted that all prediction models that were used in trying to predict trajectories and immunity built-up were modelled around the reported figures and recovery charts of China, however, it's now been shown that the figures and recovery claim China was reporting were all window dresses, i.e. all false. Italy and Spain have gotten themselves in trouble using the models. At this point, nobody knows how bad or how long the economic shutdown will last.