The FTSE 100 has recovered from a low of close to 5800 to well over 6000. Sterling has recovered from a low of $1.34 to over $1.37.
Meanwhile, Cameron is going without invoking Article 50 to initiate Brexit negotiations with the EU on the grounds that it would be for a new PM to decide. And, possibly, that new PM - whoever he or she turns out to be - may conclude that he should not invoke Article 50 until he has secured his position by means of a general election. Which raises the question of whether a new government would feel obliged to pursue Brexit - depending on the manifesto on which it had been elected.
Old Heraclitus had it right when he said all is flux and nothing remains the same.