https://api.data.payoff.ch/v2/underlyings/US09253U1088?share=1

{
    "isin": "US09253U1088",
    "symbol": "BX",
    "valor": "3019965",
    "name": "The Blackstone Group LP",
    "assetClass": "Aktien",
    "tradingExchangeName": "NYSE",
    "bid": null,
    "ask": null,
    "bidSize": null,
    "askSize": null,
    "last": null,
    "lastDateTime": null,
    "change": null,
    "ttsId": null
}