Golub Capital BDC Inc
Golub Capital BDC Inc (GBDC) Historical Volatility
GBDC 30-day historical volatility is 16%. This ranks in the 12th percentile of readings over the past year.
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Tracking GBDC historical volatility helps you see how much Golub Capital BDC Inc's stock price has actually moved over past periods, giving you a baseline to judge whether current option premiums are fair, cheap, or expensive. While implied volatility tells you what the market expects, Golub Capital BDC Inc's HV tells you what really happened. Use our scanner to monitor GBDC 30 day historical volatility alongside longer lookback windows and spot the moments when realized and implied diverge.
Historical volatility is the annualized standard deviation of an underlying's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. The GBDC 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Golub Capital BDC Inc's HV to its implied volatility reveals the volatility risk premium — when IV sits well above HV, option sellers tend to have an edge; when HV runs hot relative to IV, buyers may be underpaying for movement.
Golub Capital BDC, Inc. (GBDC) is a business development company and operates as an externally managed closed-end non-diversified management investment company. It invests in debt and minority equity investments in middle-market companies that are, in most cases, sponsored by private equity investors. It typically invests in diversified consumer services, automobiles, healthcare technology, insurance, health care equipment and supplies, hotels, restaurants and leisure, healthcare providers and services, IT services and specialty retails. It seeks to invest in the United States. It primarily invests in first lien traditional senior debt, first lien one stop, junior debt and equity, senior secured, one stop, unitranche, second lien, subordinated and mezzanine loans of middle-market companies, and warrants.
Sizing a long premium trade, modeling a covered call, or hunting volatility arbitrage all come back to one question: how much has the stock actually moved? Our scanner puts Golub Capital BDC Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where GBDC HV is running hot, cold, or in line. Make the GBDC 30 day historical volatility — and every other window — work for your edge instead of against it.
As of September 30, 2026
As of September 30, 2026
See how volatility has moved over time
Track GBDC historical volatility, spot where IV and realized volatility diverge, and find options that are priced in your favor right now.
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