Even so, when you compare Block's PEG ratio to peers like PayPal (NASDAQ: PYPL) , Visa (NYSE: V) , and Mastercard (NYSE: MA) , the company appears quite expensive. Block shares have tumbled 55% in the past year as part of a broader tech sell-off related to rising interest rates, inflation, and concerns involving Russia and Ukraine. Block's Cash App ecosystem now competes with companies in debit and prepaid cards, stock trading, tax filings, digital wallets, and Bitcoin exchange spaces, among other areas.