Were the differences between Labour and Conservative on all other economic matters visible to the naked eye, there might be some impact on markets from the size of a Labour re-election majority. The government talks earnestly of mandates. But where the economy is concerned, it lacks any reforming zeal. The only mandate it seeks is to continue to act as cautious custodian of the status quo. Which is all something of a relief.
Investors have much to fret over without the added complication of political risk.
Let others examine whether or not Labour's conservatism is in fact a cloak for cowardice. Keep a small fraction of an eye on the debate, just in case it prompts an unexpected dash of radical sauce in the electoral stew. But focus most of your attention on the American economy. A colleague has unearthed a paper by a US academic written last December that makes very salutary reading now. Watch hours, employment, durable sales especially autos and housing.