I believe that the recent Labour victory in the UK, which promises significant investment in homebuilding, will drive up the value of PSMMY. This aligns well with my long position, anticipating strong growth in the housing sector and increased demand for British homebuilder stocks.

Given the Labour Party's commitment to a significant increase in homebuilding, I anticipate that PSMMY could face challenges in sustaining its growth. Therefore, I believe a short position on this stock is warranted as it may decline in response to potential market corrections in the housing sector.