The web search results provided for this claim discuss UBS and market outlooks but do not mention a specific 'two-week ceasefire between the U.S. and Iran' expiring on a Wednesday, nor do they confirm UBS's specific prediction about stocks outperforming upon extension or peace. The evidence is insufficient to corroborate the specific premise of the claim.

The web search results confirm that Andrew Garthwaite is a strategist at UBS discussing global markets, but none of the provided snippets detail a specific 'score using three yardsticks' involving 'Commodity exposure to the Middle East Pricing ability Sensitivity to past supply shocks' as described in the claim. This specific methodology cannot be verified.

The web search results mention UBS analysts ranking stocks based on drivers (REVS framework) and publishing top/bottom rankings, but none of the provided evidence explicitly states that stocks were ranked on a scale of 'plus or minus 10' representing winners or losers upon peace.

The web search results discuss the U.S. and Iran conflict timeline (e.g., Feb 28 start date) and intelligence reports, but none of the provided snippets mention that UBS specifically factored in the 'degree of underperformance since the start of the U.S.-Iran war in late February' into its analysis.

The web search results confirm that Southwest Airlines has faced financial issues and that UBS upgraded the stock citing potential benefits from new initiatives. However, none of the provided evidence confirms that Southwest 'fell more than 25% at its low during the war' or that it is generally regarded as a beneficiary if hostilities end, beyond the context of the UBS upgrade.

The web search results confirm that Procter & Gamble (P&G) is a major consumer goods corporation. However, none of the provided evidence explicitly state that P&G is identified as a potential stock winner in the context of the U.S.-Iran conflict analysis.

Two web search results mention P&G's stock performance relative to other metrics (one mentioning a 14.4% drop in the past year, another mentioning a 3% dividend), but neither source corroborates the specific figures cited in the claim: '14% below its pre-war level' AND 'gained 17% in the first two months of the year' for P&G.

The web search results provided for this claim were empty, and the Wikipedia entries only detail past incidents (crashes/fires) involving UPS flights, not a general expectation that UPS 'stands to gain if further conflict is avoided.' Therefore, the claim cannot be corroborated.